Skip to main content
Skip to Filters
163 listings
  • Price Drop
    $28,299
    fair price
    $1,548 below market
    • 57,226 miles
    • No accidents, 1 owner, rental vehicle
    • 24 City / 31 Hwy MPG
    • Enterprise Car Sales (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Rochester, NY / 1,358 miles away from Katy, TX

    Transfer of vehicle from another location to your neighborhood Enterprise Car Sales may require payment of a non-refundable transfer fee to begin the ...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: No

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    27 Combined MPG (24 City/31 Highway)

    Listing Information:

    VIN: WAUD3BF24PN018458
    Stock: 8DN4YT
    Certified Pre-Owned: No
    Listed since: 05-06-2025

  • $29,990
    fair price
    $449 below market
    • 52,155 miles
    • No accidents, 2 owners, personal use
    • 22 City / 29 Hwy MPG
    • Carvana (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Chicago, IL / 945 miles away from Katy, TX

    At Carvana, we go miles beyond the extra mile. That's why we provide you with a convenient, fast, and hassle-free car buying experience that puts you ...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: Yes

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    24 Combined MPG (22 City/29 Highway)

    Listing Information:

    VIN: WAUL2BF2XMN014778
    Stock: 2003734000
    Certified Pre-Owned: No
    Listed since: 05-15-2025

  • New Listing
    $31,990
    fair price
    $6 below market
    • 51,692 miles
    • No accidents, 1 owner, personal use
    • 22 City / 29 Hwy MPG
    • Carvana (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Memphis, TN / 502 miles away from Katy, TX

    At Carvana, we go miles beyond the extra mile. That's why we provide you with a convenient, fast, and hassle-free car buying experience that puts you ...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: Yes

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    24 Combined MPG (22 City/29 Highway)

    Listing Information:

    VIN: WAUL2AF26MN080979
    Stock: 2003797600
    Certified Pre-Owned: No
    Listed since: 06-12-2025

  • Selling or trading in?

    Know what your car is worth while you shop for your next vehicle.

    See my car’s value
  • New Listing
    $28,999
    fair price
    $1,072 below market
    • 55,859 miles
    • No accidents, 1 owner, rental vehicle
    • 24 City / 31 Hwy MPG
    • Enterprise Car Sales (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Blackwood, NJ / 1,359 miles away from Katy, TX

    Transfer of vehicle from another location to your neighborhood Enterprise Car Sales may require payment of a non-refundable transfer fee to begin the ...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: No

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    27 Combined MPG (24 City/31 Highway)

    Listing Information:

    VIN: WAUD3BF22PN021651
    Stock: 8DN9MJ
    Certified Pre-Owned: No
    Listed since: 05-14-2025

  • $30,999
    fair price
    $616 below market
    • 47,141 miles
    • No accidents, 1 owner, personal use only
    • 24 City / 31 Hwy MPG
    • Enterprise Car Sales (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Saint Louis, MO / 685 miles away from Katy, TX

    Transfer of vehicle from another location to your neighborhood Enterprise Car Sales may require payment of a non-refundable transfer fee to begin the ...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: Yes

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    27 Combined MPG (24 City/31 Highway)

    Listing Information:

    VIN: WAUD3BF22PN030978
    Stock: 8D173L
    Certified Pre-Owned: No
    Listed since: 03-30-2025

    • 27,170 miles
    • No accidents, 1 owner, personal use
    • 21 City / 30 Hwy MPG
    • Audi North Houston (27 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Houston, TX / 27 miles away from Katy, TX

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: Yes

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    24 Combined MPG (21 City/30 Highway)

    Listing Information:

    VIN: WAUL2BF28NN008446
    Stock: 426547259
    Certified Pre-Owned: No
    Listed since: 05-23-2025

  • Price Drop
    $46,042
    fair price
    $199 below market
    • 5,093 miles
    • No accidents, 2 owners, personal use
    • 23 City / 33 Hwy MPG
    • Driveway (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Fort Lauderdale, FL / 990 miles away from Katy, TX

    CarFax No Accidents Reported,Low Mileage,Rare Find,Apple CarPlay,Back-Up Camera,Blind Spot Monitor,Bluetooth,Brake Assist,Heated Seats,Heated Steering...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: Yes

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    26 Combined MPG (23 City/33 Highway)

    Listing Information:

    VIN: WAUE3BF21RN031370
    Stock: RN031370SP
    Certified Pre-Owned: No

  • Price Drop
    $35,990
    fair price
    $1,916 below market
    • 43,393 miles
    • 1 accident, 1 owner, corporate fleet vehicle
    • 22 City / 30 Hwy MPG
    • Carvana (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Portland, OR / 1,811 miles away from Katy, TX

    At Carvana, we go miles beyond the extra mile. That's why we provide you with a convenient, fast, and hassle-free car buying experience that puts you ...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: No

    Personal Use Only: No

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    25 Combined MPG (22 City/30 Highway)

    Listing Information:

    VIN: WAUL2BF21RN012926
    Stock: 2003493172
    Certified Pre-Owned: No
    Listed since: 03-04-2025

  • Price Drop
    $42,990
    fair price
    $1,002 above market
    • 25,400 miles
    • No accidents, 1 owner, personal use only
    • 21 City / 30 Hwy MPG
    • Carvana (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Oklahoma City, OK / 404 miles away from Katy, TX

    At Carvana, we go miles beyond the extra mile. That's why we provide you with a convenient, fast, and hassle-free car buying experience that puts you ...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: Yes

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    24 Combined MPG (21 City/30 Highway)

    Listing Information:

    VIN: WAUL2BF26NN061923
    Stock: 2003806935
    Certified Pre-Owned: No
    Listed since: 06-11-2025

  • New Listing
    • 26,522 miles
    • No accidents, 2 owners, personal use
    • 21 City / 30 Hwy MPG
    • Carvana (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in San Antonio, TX / 163 miles away from Katy, TX

    At Carvana, we go miles beyond the extra mile. That's why we provide you with a convenient, fast, and hassle-free car buying experience that puts you ...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: Yes

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    24 Combined MPG (21 City/30 Highway)

    Listing Information:

    VIN: WAUL2BF25NN019520
    Stock: 2003745288
    Certified Pre-Owned: No
    Listed since: 05-27-2025

    • 42,899 miles
    • No accidents, 2 owners, personal use
    • 22 City / 29 Hwy MPG
    • Audi North Houston (27 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Houston, TX / 27 miles away from Katy, TX

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: Yes

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    24 Combined MPG (22 City/29 Highway)

    Listing Information:

    VIN: WAUL2AF28LN058772
    Stock: 431765337
    Certified Pre-Owned: No
    Listed since: 06-12-2025

  • New Listing
    • 20,471 miles
    • No accidents, 1 owner, rental vehicle
    • 23 City / 33 Hwy MPG
    • Keating Toyota (33 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Manvel, TX / 33 miles away from Katy, TX

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: No

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    26 Combined MPG (23 City/33 Highway)

    Listing Information:

    VIN: WAUE3BF27RN016288
    Stock: RN016288P
    Certified Pre-Owned: No
    Listed since: 11-12-2024

  • New Listing
    • 31,369 miles
    • No accidents, 1 owner, personal use
    • 22 City / 29 Hwy MPG
    • Carvana (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Columbus, OH / 1,008 miles away from Katy, TX

    At Carvana, we go miles beyond the extra mile. That's why we provide you with a convenient, fast, and hassle-free car buying experience that puts you ...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: Yes

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    24 Combined MPG (22 City/29 Highway)

    Listing Information:

    VIN: WAUL2AF21LN085974
    Stock: 2003790210
    Certified Pre-Owned: No
    Listed since: 06-06-2025

  • Price Drop
    $39,593
    fair price
    $521 below market
    • 31,262 miles
    • No accidents, 1 owner, rental vehicle
    • 22 City / 30 Hwy MPG
    • Driveway (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Coral Springs, FL / 982 miles away from Katy, TX

    Rare Find,Apple CarPlay,Back-Up Camera,Blind Spot Monitor,Bluetooth,Brake Assist,Heated Seats,Heated Steering Wheel,Keyless Start,Lane Departure Warni...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: No

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    25 Combined MPG (22 City/30 Highway)

    Listing Information:

    VIN: WAUL2BF22RN012496
    Stock: SPRN012496
    Certified Pre-Owned: No

  • $37,998
    fair price
    $452 above market
    • 32,636 miles
    • No accidents, 1 owner, personal use
    • 23 City / 33 Hwy MPG
    • CarMax (In-stock online)
    • Transfer available from CO to TX*
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Colorado Springs, CO / 807 miles away from Katy, TX

    CarMax values transparency and wants you to love your next car, not settle on it. Certain vehicles may have unrepaired safety recalls. Check nhtsa.gov...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: Yes

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    26 Combined MPG (23 City/33 Highway)

    Listing Information:

    VIN: WAUE3BF27RN014444
    Stock: 27414396
    Certified Pre-Owned: No

  • $40,999
    fair price
    $780 above market
    • 30,686 miles
    • No accidents, 1 owner, rental vehicle
    • 22 City / 30 Hwy MPG
    • Enterprise Car Sales (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Cranberry Township, PA / 1,160 miles away from Katy, TX

    Transfer of vehicle from another location to your neighborhood Enterprise Car Sales may require payment of a non-refundable transfer fee to begin the ...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: No

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    25 Combined MPG (22 City/30 Highway)

    Listing Information:

    VIN: WAUL2BF28RN012129
    Stock: 8FVK3Q
    Certified Pre-Owned: No
    Listed since: 05-19-2025

  • New Listing
    • 48,334 miles
    • No accidents, 1 owner, personal use
    • 22 City / 29 Hwy MPG
    • CarMax (In-stock online)
    • Transfer available from CO to TX*
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Parker, CO / 843 miles away from Katy, TX

    CarMax values transparency and wants you to love your next car, not settle on it. Certain vehicles may have unrepaired safety recalls. Check nhtsa.gov...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: Yes

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    24 Combined MPG (22 City/29 Highway)

    Listing Information:

    VIN: WAUL2AF20MN044558
    Stock: 27480098
    Certified Pre-Owned: No

  • New Listing
    $32,998
    fair price
    $105 above market
    • 47,396 miles
    • No accidents, 1 owner, corporate fleet vehicle
    • 22 City / 29 Hwy MPG
    • CarMax (In-stock online)
    • Transfer available from CO to TX*
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Federal Heights, CO / 869 miles away from Katy, TX

    CarMax values transparency and wants you to love your next car, not settle on it. Certain vehicles may have unrepaired safety recalls. Check nhtsa.gov...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: No

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    24 Combined MPG (22 City/29 Highway)

    Listing Information:

    VIN: WAUL2AF27MN040197
    Stock: 27258970
    Certified Pre-Owned: No

  • New Listing
    • 8,664 miles
    • No accidents, 1 owner, personal use
    • 23 City / 33 Hwy MPG
    • Driveway (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Maplewood, NJ / 1,424 miles away from Katy, TX

    CarFax No Accidents Reported,CarFax 1-Owner,Apple CarPlay,Back-Up Camera,Blind Spot Monitor,Bluetooth,Brake Assist,Heated Seats,Heated Steering Wheel,...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: Yes

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    26 Combined MPG (23 City/33 Highway)

    Listing Information:

    VIN: WAUD3BF24RN040687
    Stock: MDP25266
    Certified Pre-Owned: No

  • Price Drop
    • 5,431 miles
    • No accidents, 1 owner, personal use
    • 24 City / 31 Hwy MPG
    • Driveway (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Minneapolis, MN / 1,055 miles away from Katy, TX

    CarFax No Accidents Reported,CarFax 1-Owner,Rare Find,Apple CarPlay,Back-Up Camera,Blind Spot Monitor,Bluetooth,Brake Assist,Heated Seats,Heated Steer...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: Yes

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    26 Combined MPG (24 City/31 Highway)

    Listing Information:

    VIN: WAUD3BF20SN000967
    Stock: SN000967R
    Certified Pre-Owned: No

    • 13,857 miles
    • No accidents, 1 owner, personal use
    • 22 City / 29 Hwy MPG
    • Carvana (In-stock online)
    • Home delivery*
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Atlanta, GA / 721 miles away from Katy, TX

    At Carvana, we go miles beyond the extra mile. That's why we provide you with a convenient, fast, and hassle-free car buying experience that puts you ...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: Yes

    History Provider: AutoCheck

    Title Details: Clean Title

    Salvage Vehicle: No

    Frame Damage: No

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    24 Combined MPG (22 City/29 Highway)

    Listing Information:

    VIN: WAUM2AF21MN047909
    Stock: 2003735114
    Certified Pre-Owned: No
    Listed since: 06-12-2025

Showing 127 - 147 out of 163 listings

Consumer Reviews for the Audi A6

Read recent reviews for the Audi A6
Overall Consumer Rating
4.4 out of 5 stars34 Reviews
Write a vehicle reviewSee all 34 reviews
  • 5 star
    (62%)
  • 4 star
    (32%)
  • 3 star
    (3%)
  • 2 star
    (0%)
  • 1 star
    (3%)
5 out of 5 stars

Long term A6 review

mikkel, 12/03/2018
2010 Audi A6 3.0T Premium quattro 4dr Sedan AWD (3.0L 6cyl S/C 6A)
Single owner, long term review had the car for all of its 91,000 Miles and I still love the car. My only complaint is that the Aux cord adapters for the newer iphones are super glitchy and if you take a fast turn it disconnects. Besides regular maintenance the car has run excellent just had a service done a few months ago and there are still no known leaks and everything came back Green … on the service report. The only issue was at 48,000 miles a temperature gauge started reading incorrectly and was replaced under warranty. I had plans on selling this car whenever it started having issues but that has yet to happen, i've gone though winter storms and multiple feet of snow in different states and it handles like a champ with my Snow tires on - I've never had to use cables. the leather seats are still in great condition and nothing is broken. The car chews through tires pretty fast considering that i do not drive recklessly and a lot of freeway miles. but the great mpg makes up for it, on many road trips i get about 27+ mpg. June 2020 update - at 106,400 miles now - car is still running flawlessly with no issues since last
Report abuse

Used 2023 Audi A6 in Katy, TX Values

Estimated values
2023 Audi A6 Premium 4dr Sedan AWD w/45 TFSI (2.0L 4cyl Turbo gas/electric mild hybrid 7AM) with no options
ConditionTrade-InPrivate PartyDealer Retail
Outstanding$27,012$28,559$30,300
Clean$26,640$28,101$29,747
Average$26,021$27,339$28,826
Rough$25,216$26,348$27,628

The average list price of a used 2023 Audi A6 in Katy, Texas is $37,914. The average mileage on a used Audi A6 2023 for sale in Katy, Texas is 33,555. Based on the average mileage of 33,555 for used 2023 Audi A6 for sale in Katy, TX and using an average vehicle condition rating, which means the vehicle may have a few mechanical and/or cosmetic problems and may require a considerable amount of reconditioning, we appraise the average trade-in value of a used Audi A6 2023 in Katy, Texas to be $26,021.

Filters
Skip to Results

Applied Filters4Active

Location

Search radius100 miles
Search radius

Make & Model

Year

New / Used

Price & Payments

Price Rating

Trim

Mileage

Accidents & History

Engine & Drivetrain

Exterior Color

Interior Color

Total Seating

Edmunds Review

Features

Options & Packages

MPG

Listing Details


* Delivery of any kind does not apply to Alaska and Hawaii. Contact the dealer for delivery details, restrictions and costs.