Skip to main content
Skip to Filters
1,098 listings
  • New Listing
    • 76,975 miles
    • No accidents, 2 owners, corporate fleet vehicle
    • 24 City / 31 Hwy MPG
    • Ray Skillman Mazda West (489 mi away)
    • AWD/4WD
    • Bluetooth
    • Leather Seats
    • Sunroof/Moonroof
    • Keyless Entry/Start
    Close

    Located in Indianapolis, IN / 489 miles away from Columbia, SC

    Black 2022 Audi A4 45 S line Premium Plus ABS brakes, Alloy wheels, Compass, Electronic Stability Control, Front dual zone A/C, Heated door mirrors, H...

    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: WAUEAAF40NN008867
    Stock: JZ1232
    Certified Pre-Owned: No
    Listed since: 04-22-2025

    • 46,110 miles
    • No accidents, 2 owners, personal use
    • 24 City / 32 Hwy MPG
    • Hyman Bros Kia (303 mi away)
    • AWD/4WD
    • Bluetooth
    • Leather Seats
    • Sunroof/Moonroof
    • Keyless Entry/Start
    Close

    Located in Midlothian, VA / 303 miles away from Columbia, SC

    Heated Leather Seats, Sunroof, Keyless Start, Onboard Communications System, iPod/MP3 Input, Satellite Radio, Turbo Charged, All Wheel Drive, BLACK OP...

    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/32 Highway)

    Listing Information:

    VIN: WAUEAAF40PA024545
    Stock: 17798
    Certified Pre-Owned: No
    Listed since: 04-25-2025

    • 30,703 miles
    • No accidents, 1 owner, personal use only
    • 24 City / 31 Hwy MPG
    • Audi Stuart (482 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Stuart, FL / 482 miles away from Columbia, SC

    Recent Arrival! 2021 Audi A4 45 S line Premium Plus quattro !! AUDI CERTIFIED !!, ** PREMIUM PLUS **, ** QUATTRO ALL WHEEL DRIVE **, Apple Carplay/And...

    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: WAUEAAF44MA057883
    Stock: BMA057883
    Certified Pre-Owned: Yes
    Listed since: 06-13-2025

  • Selling or trading in?

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

    See my car’s value
  • Stock photo**
    $14,506
    fair price
    $164 below market
    • 96,364 miles
    • 1 accident, 4 owners, personal use
    • 25 City / 33 Hwy MPG
    • Linwood Chevrolet Buick GMC (466 mi away)
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Sunroof/Moonroof
    • Keyless Entry/Start
    Close

    Located in Mayfield, KY / 466 miles away from Columbia, SC

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: No

    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:

    28 Combined MPG (25 City/33 Highway)

    Listing Information:

    VIN: WAULMAF44JA127943
    Stock: C1487A
    Certified Pre-Owned: No
    Listed since: 05-31-2025

  • $25,300
    fair price
    $56 above market
    • 47,909 miles
    • 2 accidents, 1 owner, corporate fleet vehicle
    • 24 City / 31 Hwy MPG
    • Capital Chrysler Dodge Jeep Ram of Indian Trail (70 mi away)
    • AWD/4WD
    • Bluetooth
    • Leather Seats
    • Sunroof/Moonroof
    • Keyless Entry/Start
    Close

    Located in Monroe, NC / 70 miles away from Columbia, SC

    New Price! (Capital Chrysler Dodge Jeep Ram of Indian Trail) is proud to present you with another True Market Priced Pre-Owned Vehicle. This 2022 Audi...

    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:

    27 Combined MPG (24 City/31 Highway)

    Listing Information:

    VIN: WAUEAAF40NN015107
    Stock: 13AN5244
    Certified Pre-Owned: No
    Listed since: 05-07-2025

  • Price Drop
    • 15,210 miles
    • No accidents, 2 owners, rental vehicle
    • 24 City / 33 Hwy MPG
    • Harper Audi (214 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Knoxville, TN / 214 miles away from Columbia, SC

    Certified. Check out all these great options 18" Wheel Package (Wheels: 18" 10-Spoke-Dynamic Design Bi-Color Finish), Convenience Package (Adaptive Cr...

    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:

    28 Combined MPG (24 City/33 Highway)

    Listing Information:

    VIN: WAUCBAF48PN017212
    Stock: 6012P
    Certified Pre-Owned: Yes
    Listed since: 06-06-2025

  • $16,995
    fair price
    $565 above market
    • 78,342 miles
    • 1 accident, 3 owners, corporate fleet vehicle
    • 24 City / 34 Hwy MPG
    • Cars Of Tampa (427 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Tampa, FL / 427 miles away from Columbia, SC

    *** 2018 AUDI A4 2.0T QUATTRO PREMIUM *** CARFAX CERTIFIED *** VERY CLEAN INTERIOR , GOOD CARPET , A/C IS ICE COLD ! DRIVE IS PERFECT ! POWERFUL , LU...

    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:

    27 Combined MPG (24 City/34 Highway)

    Listing Information:

    VIN: WAUDNAF45JA065423
    Stock: 9595
    Certified Pre-Owned: No
    Listed since: 04-26-2025

  • $25,488
    fair price
    $122 above market
    • 34,377 miles
    • 1 accident, 2 owners, personal use
    • 24 City / 31 Hwy MPG
    • Rich Morton Mazda (426 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Pasadena, MD / 426 miles away from Columbia, SC

    2021 Audi A4 Daytona Gray Pearl quattro 7-Speed Automatic S tronic 45 S line Premium quattro 2.0L TFSI 7-Speed Automatic S tronic, quattro, Black Leat...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: No

    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: WAUDAAF4XMA029971
    Stock: 029971P
    Certified Pre-Owned: No
    Listed since: 02-28-2025

    • 50,000 miles
    • Frame damage reported, 3 owners, corporate fleet vehicle
    • 24 City / 34 Hwy MPG
    • Huffmans Auto Sales (426 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Mount Pleasant, PA / 426 miles away from Columbia, SC

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: No

    Personal Use Only: No

    History Provider: AutoCheck

    Title Details: Issue reported

    Salvage Vehicle: No

    Frame Damage: Yes

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    27 Combined MPG (24 City/34 Highway)

    Listing Information:

    VIN: WAUDNAF46JA017154
    Stock: 34803
    Certified Pre-Owned: No
    Listed since: 02-13-2025

  • New Listing
    • 69,424 miles
    • 1 accident, 3 owners, corporate fleet vehicle
    • 27 City / 37 Hwy MPG
    • CarMax (In-stock online)
    • Transfer available from OK to SC*
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Oklahoma City, OK / 938 miles away from Columbia, SC

    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: 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:

    31 Combined MPG (27 City/37 Highway)

    Listing Information:

    VIN: WAULMAF48JA227043
    Stock: 26017932
    Certified Pre-Owned: No

  • Price Drop
    $26,590
    fair price
    $553 above market
    • 41,888 miles
    • 1 accident, 1 owner, corporate fleet vehicle
    • 25 City / 34 Hwy MPG
    • Carvana - Atlanta (196 mi away)
    • Home delivery*
    • AWD/4WD
    • Bluetooth
    • Leather Seats
    • Sunroof/Moonroof
    • Keyless Entry/Start
    Close

    Located in Atlanta, GA / 196 miles away from Columbia, SC

    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:

    28 Combined MPG (25 City/34 Highway)

    Listing Information:

    VIN: WAUBBAF40MN012240
    Stock: 2003739325
    Certified Pre-Owned: No
    Listed since: 05-20-2025

  • New Listing
    • 2,516 miles
    • No accidents, 1 owner, personal use only
    • 24 City / 32 Hwy MPG
    • Hyman Bros INFINITI of Richmond (304 mi away)
    • AWD/4WD
    • Bluetooth
    • Leather Seats
    • Sunroof/Moonroof
    • Keyless Entry/Start
    Close

    Located in Midlothian, VA / 304 miles away from Columbia, SC

    ~LOCAL TRADE~ ONE OWNER~ CLEAN CARFAX! LOW LOW MILES~ PRISTINE~

    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/32 Highway)

    Listing Information:

    VIN: WAUEAAF47RN018883
    Stock: S755171
    Certified Pre-Owned: No
    Listed since: 03-20-2025

  • Price Drop
    • 10,126 miles
    • No accidents, 1 owner, personal use
    • 24 City / 32 Hwy MPG
    • Bates Ford (332 mi away)
    • AWD/4WD
    • Bluetooth
    • Leather Seats
    • Sunroof/Moonroof
    • Keyless Entry/Start
    Close

    Located in Lebanon, TN / 332 miles away from Columbia, SC

    We'll trade for anything that don't eat!Daytona Gray Pearl 2024 Audi A4 45 S line Premium Plus quattro quattro 7-Speed Automatic S tronic 2.0L 4-Cylin...

    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: Yes

    Features and Specs:

    27 Combined MPG (24 City/32 Highway)

    Listing Information:

    VIN: WAUEAAF49RN018979
    Stock: U7890
    Certified Pre-Owned: No
    Listed since: 05-14-2025

    • 88,933 miles
    • No accidents, 1 owner, personal use
    • 25 City / 33 Hwy MPG
    • Kurtis Chevrolet (244 mi away)
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Sunroof/Moonroof
    • Keyless Entry/Start
    Close

    Located in Morehead City, NC / 244 miles away from Columbia, SC

    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:

    28 Combined MPG (25 City/33 Highway)

    Listing Information:

    VIN: WAUKMAF45JA141054
    Stock: 25236A
    Certified Pre-Owned: No
    Listed since: 06-04-2025

  • New Listing
    • 98,733 miles
    • No accidents, 3 owners, personal use only
    • 24 City / 34 Hwy MPG
    • Maz Auto Sales (69 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Monroe, NC / 69 miles away from Columbia, SC

    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/34 Highway)

    Listing Information:

    VIN: WAUDNAF44JA036771
    Stock: 036771
    Certified Pre-Owned: No

  • Price Drop
    • 45,602 miles
    • No accidents, 1 owner, personal use only
    • 24 City / 31 Hwy MPG
    • Carvana - Indianapolis (484 mi away)
    • Home delivery*
    • AWD/4WD
    • Bluetooth
    • Leather Seats
    • Sunroof/Moonroof
    • Keyless Entry/Start
    Close

    Located in Indianapolis, IN / 484 miles away from Columbia, SC

    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:

    27 Combined MPG (24 City/31 Highway)

    Listing Information:

    VIN: WAUEAAF46MA050000
    Stock: 2003664953
    Certified Pre-Owned: No
    Listed since: 04-29-2025

    • 27,169 miles
    • No accidents, 1 owner, personal use only
    • 27 City / 37 Hwy MPG
    • Carvana (In-stock online)
    • Home delivery*
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Phoenix, AZ / 1,774 miles away from Columbia, SC

    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:

    31 Combined MPG (27 City/37 Highway)

    Listing Information:

    VIN: WAUKMAF4XJN015975
    Stock: 2003821305
    Certified Pre-Owned: No
    Listed since: 06-14-2025

    • 134,561 miles
    • No accidents, 2 owners, personal use only
    • 24 City / 34 Hwy MPG
    • Oxford Car and Truck (204 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Navigation
    • Leather Seats
    Close

    Located in Oxford, NC / 204 miles away from Columbia, SC

    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/34 Highway)

    Listing Information:

    VIN: WAUENAF44JN013598
    Stock: 6542
    Certified Pre-Owned: No
    Listed since: 04-11-2025

  • New Listing
    • 29,820 miles
    • No accidents, 2 owners, personal use
    • 24 City / 32 Hwy MPG
    • CarMax South Boulevard (70 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Pineville, NC / 70 miles away from Columbia, SC

    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:

    27 Combined MPG (24 City/32 Highway)

    Listing Information:

    VIN: WAUFAAF43PA006979
    Stock: 27398989
    Certified Pre-Owned: No

  • New Listing
    • 36,939 miles
    • 1 accident, 2 owners, personal use
    • 24 City / 31 Hwy MPG
    • Rohrich Lexus (439 mi away)
    • AWD/4WD
    • Bluetooth
    • Navigation
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Pittsburgh, PA / 439 miles away from Columbia, SC

    Odometer is 1148 miles below market average![NAVIGATION PACKAGE], [HEATED FRONT SEATS], [BACKUP CAMERA], [BANG & OLUFSEN PREMIUM SURROUND SOUND AUDIO]...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: No

    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: WAUFAAF48MA014880
    Stock: L25225B
    Certified Pre-Owned: No
    Listed since: 04-21-2025

    • 42,840 miles
    • Frame damage reported, 2 owners, corporate fleet vehicle
    • 24 City / 31 Hwy MPG
    • Alpha Motor Sports (349 mi away)
    • AWD/4WD
    • Back-up camera
    • Bluetooth
    • Leather Seats
    • Sunroof/Moonroof
    Close

    Located in Fredericksburg, VA / 349 miles away from Columbia, SC

    ** OVER 30,000 VEHICLES SOLD, TWO LOCATION TO SERVE YOU, 400+ VEHICLES IN STOCK, visit www.AlphaMS.com to view our inventory, BEST PRICES IN TOWN **NA...

    AutoCheck Vehicle History Summary

    Accident Free Vehicle: Yes

    Personal Use Only: No

    History Provider: AutoCheck

    Title Details: Issue reported

    Salvage Vehicle: No

    Frame Damage: Yes

    Theft History: No

    Lemon Status: No

    Free History Report: No

    Features and Specs:

    27 Combined MPG (24 City/31 Highway)

    Listing Information:

    VIN: WAUDAAF40NN004913
    Stock: S004913
    Certified Pre-Owned: No

Showing 778 - 798 out of 1,098 listings

Consumer Reviews for the Audi A4

Read recent reviews for the Audi A4
Overall Consumer Rating
4.1 out of 5 stars68 Reviews
Write a vehicle reviewSee all 68 reviews
  • 5 star
    (60%)
  • 4 star
    (16%)
  • 3 star
    (9%)
  • 2 star
    (4%)
  • 1 star
    (10%)
5 out of 5 stars

Audi A4 Wagon, great car but is an oilaholic!

David TW, 07/30/2015
2010 Audi A4 2.0T Avant Premium quattro 4dr Wagon AWD (2.0L 4cyl Turbo 6A)
I love my 2010 Audi A4 Avant, its the third Audi I've owned but it slurps down oil at an average rate of a Qt every 670 miles. My previous cars which included two Audis (a 2004 S4 Avant and an 2007 AllRoad V8 never needed the hood opening between services. That is true for the four BMW's (three 7 series and a 535 xi wagon). Its just not right. My dealer Audi of Fairfield County tells me … the consumption is within range but we all know that's a sham. Audi agreed to settle a lawsuit last year where they agreed to replace the crankcase pressure regulating valve. front crankshaft seal and front crankshaft bolt, they will also update the engine control module control software to match the new parts, all free of charge. I intend to take this up with them next week. I really love this car and hope this can be resolved or it will be time to move on. I will keep you posted
Report abuse

Used 2022 Audi A4 in Columbia, SC Values

Estimated values
2022 Audi A4 Premium Plus S line 4dr Sedan AWD w/45 TFSI (2.0L 4cyl Turbo gas/electric mild hybrid 7AM) with no options
ConditionTrade-InPrivate PartyDealer Retail
Outstanding$20,062$21,551$23,107
Clean$19,726$21,166$22,669
Average$19,167$20,525$21,937
Rough$18,440$19,690$20,987

The average list price of a used 2022 Audi A4 in Columbia, South Carolina is $24,978. The average mileage on a used Audi A4 2022 for sale in Columbia, South Carolina is 52,597. Based on the average mileage of 52,597 for used 2022 Audi A4 for sale in Columbia, SC 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 A4 2022 in Columbia, South Carolina to be $19,167.

Filters
Skip to Results

Applied Filters4Active

Location

Search radius500 miles
Search radius

Make & Model

Year

New / Used

Price & Payments

Price Rating

Body Type

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.