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Mercedes-Benz SL-Class Specs

Since 2008 the SL-Class has grown 3.5″ in length and shed 503 lb, so today's car is longer yet lighter than the first one.

NHTSA vPIC · Transport Canada · 3 generations · 2008–2021 · Updated Nov 4, 2026
Quick answer

The 2021 Mercedes-Benz SL-Class, the latest model year on record, is 182.3″ long, 74″ wide and 52″ tall on a 102″ wheelbase, and weighs 3,891 lb. At 15.2 ft it fits a standard garage and leaves 2.8 ft spare in an 18-foot street space.

Every Mercedes-Benz SL-Class generation, measured

The biggest change came in 2013: the new car was 3.6″ longer and 326 lb lighter than the 2008–2012 one. The current car, sold since 2017, is 56 lb lighter than the 2013–2016 one.

FIG.01·Mercedes-Benz SL-Class dimensions by generation
GenerationLengthWidthHeightWheelbaseCurb weight
2008–2012178.7″72″51.2″100.8″4,394 lb
2013–2016182.3″74″51.2″101.6″4,068 lb
2017–2021182.7″74″52″102″4,012 lb
ROWS 3·SOURCE NHTSA vPIC / Transport Canada

SL-Class year by year

FIG.02·Mercedes-Benz SL-Class dimensions by model year
Model yearLengthWidthWheelbaseCurb weightBody styles
2021182.3″74″102″3,891 lb2
2020182.3″74″102″3,891 lb2
2019182.3″74″102″3,951 lb3
2018182.7″74″102″4,037 lb4
2017182.7″74″102″4,037 lb4
2016182.3″74″101.6″4,101 lb3
2015182.3″74″101.6″4,101 lb3
2014182.3″74″101.6″4,101 lb3
2013182.3″74″101.6″4,101 lb3
2012180.7″71.7″100.8″4,310 lb2
2011180.7″71.7″100.8″4,418 lb4
2010180.7″71.7″100.8″4,418 lb4
2009180.7″71.7″100.8″4,418 lb4
2008178.7″72″100.8″4,422 lb4
ROWS 14·SOURCE Transport Canada vehicle specifications

SL-Class on the used market

ForCar visitors have decoded 102 SL-Class VINs; the most checked model years are 2013, 2019 and 2018.

FIG.05·Mercedes-Benz SL-Class generations on the used market
GenerationListingsShareAverage asking priceAverage mileage
2017–2021102%$44,81543,352 mi
2013–20167715%$32,91258,563 mi
2008–20125210%$18,98975,423 mi
Other years36472%$18,14079,157 mi
ROWS 4·SOURCE ForCar, US used-car listings collected since June 2026

Will a SL-Class fit

FIG.02·Mercedes-Benz SL-Class — will it fit
SpaceTypical sizeThis carVerdict
Single garage20 ft deep15.2 ftFits, with room to open the door
Street parking space18 ft15.2 ftFits comfortably
Standard parking bay width8.5 ft wide6.2 ftRoom to open doors both sides
ROWS 3·SOURCE ForCar, computed from vehicle dimensions

Against cars of the same length

Among the 1,098 cars within 10″ of its length, the SL-Class has a shorter wheelbase than 85%.

FIG.03·Mercedes-Benz SL-Class against similar-sized cars
MeasureThis carTypical of 1,098 cars within 10″ of its lengthDifference
Width74″72″+2.0″
Wheelbase102″106.7″−4.7″
Curb weight3,891 lb3,532 lb+359 lb
ROWS 3·SOURCE ForCar, computed across vehicles of similar length
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Everything on the Mercedes-Benz SL-Class
Recalls59 campaignsReliability4.0/5Common problems320 complaintsCheck a VINAgainst this exact buildUsed prices1,250 listingsWhat yours is worthValue by year & mileageInsurance costEstimated per yearWindow stickerOriginal Monroney labelDecode a VINWhat each character meansAbout this car1994–2026

Frequently asked questions

Is the 2021 SL-Class bigger than the 2020?

No. The 2021 and 2020 SL-Class are the same size and weight.

Which SL-Class years share the same body?

By our measurements the body changed in 2013 and 2017. Model years inside each range, such as 2017–2021, share the same dimensions; the boundaries are estimated from changes in size.

How much does a used SL-Class cost?

In our listings collected since June 2026, the average asking price runs from $18,989 for the 2008–2012 car to $44,815 for the 2017–2021 one, across 503 listings.

Dimensions from NHTSA vPIC and Transport Canada vehicle records, manufacturer-declared for 14 SL-Class model years, 2008 to 2021. Metric values converted to inches and pounds; generation boundaries are estimated from changes in size (how we measure). Last updated Nov 2026. — ForCar Reviewed by , founder of ForCar.
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