2012 Mercedes-Benz SLK350 Road Test Specs | Edmunds

2012 Mercedes-Benz SLK-Class - Road Test Specs

2012 Mercedes-Benz SLK-Class Convertible

(3.5L V6 7-speed Automatic)


Model year2012
StyleSLK350 2dr Convertible (3.5L 6cyl 7A)
Base MSRP$55,675
Options on test vehiclePremium 1 Package ($2,590 -- includes iPod/MP3 media interface; AirScarf neck-level heating system; Sirius Satellite Radio; Harman Kardon premium sound system; heated seats; IR remote roof automation); Sport Package ($2,500 -- sport body styling includes front airdam with mesh intakes, sculpted side skirts and rear valance, 18-inch AMG five-spoke wheels, direct ambient lighting in Solar Red, Sport Package code); Multimedia Package ($2,150 -- includes COMAND system with 80GB hard drive navigation and 7-inch LCD screen with 3-D map views, enhanced voice control system, 10GB music register, six-disc DVD changer, Gracenote album information including cover art and SD memory card slot); Lighting Package ($1,090 -- includes headlamp cleaning system, bi-xenon headlamps with Active Curve Illumination); Dual-Zone Climate Control ($760); Black ($630); Panorama Roof ($500 -- includes panorama roof with fixed tinted glass)
As-tested MSRP$65,895


Drive typeRear-wheel drive
Engine typeNaturally aspirated, direct-injected V6, gasoline
Displacement (cc/cu-in)3,498/213
Block/head materialAluminum/aluminum
ValvetrainDOHC, four valves per cylinder, variable intake + exhaust-valve timing
Compression ratio (x:1)12.0
Redline (rpm)6,750
Horsepower (hp @ rpm)302 @ 6,500
Torque (lb-ft @ rpm)273 @ 3,500
Fuel typePremium unleaded (required)
Transmission typeSeven-speed automatic
Transmission and axle ratios (x:1)I=4.38, II=2.86, III=1.92, IV=1.37, V=1.0, VI=0.82, VIII=0.73


Suspension, frontIndependent MacPherson struts, coil springs, twin-tube dampers, stabilizer bar
Suspension, rearIndependent multilink, coil springs, twin-tube dampers, stabilizer bar
Steering typeHydraulic-assist, speed-proportional, rack-and-pinion steering
Steering ratio (x:1)15.5:1
Tire brandContinental
Tire modelContiSport Contact
Tire typePerformance front and rear
Tire size, front225/40R18
Tire size, rear245/35R18
Wheel size18-by-7.5 inches front -- 18-by-8.5 inches rear
Wheel materialForged aluminum
Brakes, front13.5-inch one-piece ventilated steel discs with single-piston sliding calipers
Brakes, rear11.8-inch one-piece solid steel discs with single-piston sliding calipers

Track Test Results

Acceleration, 0-30 mph (sec.)2.2
0-45 mph (sec.)3.7
0-60 mph (sec.)5.6
0-75 mph (sec.)8.1
1/4-mile (sec. @ mph)13.8 @ 100.9
0-60 with 1 foot of rollout (sec.)5.4
Braking, 30-0 mph (ft.)28
60-0 mph (ft.)113
Slalom, 6 x 100 ft. (mph)66.2
Skid pad, 200-ft. diameter (lateral g)0.87
Sound level @ idle (dB)48.2
@ Full throttle (dB)79.4
@ 70 mph cruise (dB)67.5

Test Driver Ratings & Comments

Acceleration commentsGood punch right off the line, no hesitation: the throttle is so abrupt it jerks your head back . Oddly, it was difficult to match the first run when stability control was on, the transmission was in Economy mode vs. Sport or Manual. Power braking did little to help. Manual shifting is via paddles or console-mounted shifter. Blips on downshifts. Shifts at 6,800 regardless of tranny mode.
Braking ratingExcellent
Braking commentsPerfectly controlled panic braking and very firm pedal with short travel. Exrtemely reassuring and incredibly short, consistent stops. No fade.
Handling ratingGood
Handling commentsSkid pad: Very controllable. Chassis is willing to let you play with the throttle to adjust the line and control understeer. Unfortunately, the throttle calibration makes it easy to overshoot desired throttle input. ESC hardly perceptible here when "on." Slalom: Nimble car for its weight. Narrow and low to the ground. Steering is quick but lacks feel. Tires have decent grip but there are a few hindrances. First, the suspension is quite stiff and rebounds abruptly after each turn. Second, the throttle always opens too much with each input, which upsets the car's attitude. And ESC will cut throttle when too aggressive.

Testing Conditions

Elevation (ft.)1,121
Temperature (°F)87.5
Relative humidity (%)27.5
Wind (mph, direction)0.75 headwind

Fuel Consumption

EPA fuel economy (mpg)20 city/29 highway/23 combined
Edmunds observed (mpg)21.5
Fuel tank capacity (U.S. gal.)15.9

Dimensions & Capacities

Curb weight, mfr. claim (lbs.)3,397
Curb weight, as tested (lbs.)3,405
Weight distribution, as tested, f/r (%)53/47
Length (in.)162.8
Width (in.)71.5
Height (in.)51.2
Wheelbase (in.)95.7
Track, front (in.)61.4
Track, rear (in.)61.6
Turning circle (ft.)34.5
Legroom, front (in.)42.5
Headroom, front (in.)38
Shoulder room, front (in.)52.2
Seating capacity2
Cargo volume (cu-ft)10.1
Max. cargo volume, seats folded (cu-ft)10.1


Bumper-to-bumper4 years/50,000 miles
Powertrain4 years/50,000 miles
Corrosion4 years/50,000 miles
Roadside assistanceUnlimited
Free scheduled maintenance3,000 miles


Front airbagsStandard
Side airbagsDual front
Head airbagsFront
Knee airbagsDual front
Antilock brakesFour-wheel ABS
Electronic brake enhancementsBraking assist, electronic brakeforce distribution
Traction controlTraction control
Stability controlStability control
Rollover protectionConvertible occupant rollover protection
Tire-pressure monitoring systemTire-pressure monitoring
NHTSA crash test, driverNot Tested
NHTSA crash test, passengerNot Tested
NHTSA crash test, side frontNot Tested
NHTSA crash test, side rearNot Tested
NHTSA rollover resistanceNot Tested
IIHS offsetNot Tested

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