Mercedes-Benz SL-Class Dimensions & Size

How much cargo space and room does a 2027 Mercedes-Benz SL-Class really have?

The 2021 Mercedes-Benz SL-Class measures 182.3 in long, 74 in wide, 52 in tall, on a 102 in wheelbase, with a curb weight of about 3,957 lbs.

Looking for weight? See the Mercedes-Benz SL-Class curb weight page — this page covers length, width, height and wheelbase.

Latest model year (2027):

The Mercedes-Benz SL-Class measures 182.3 in long, 74 in wide and 52 in tall, on a 102 in wheelbase, weighing about 3,957 lbs.

VerifiedNHTSA Canadian Vehicle Specifications · Verified September 18, 2026

Overview MPG Engine Specs Fuel Cost Transmission Drivetrain Vehicle Class Maintenance Dimensions Curb Weight EV Range

Mercedes-Benz SL-Class Dimensions — All Years

Year	Body / Variant	Length	Width	Height	Wheelbase	Curb Weight
2021Config 1 of 2	SL CLASS SL550 2DR CONVERTIBLE	182.3 in	74 in	52 in	102 in	3,957 lbs
2021Config 2 of 2	SL CLASS SL450 2DR CONVERTIBLE	182.3 in	74 in	52 in	102 in	3,825 lbs
2020Config 1 of 2	SL CLASS SL550 2DR CONVERTIBLE	182.3 in	74 in	52 in	102 in	3,957 lbs
2020Config 2 of 2	SL CLASS SL450 2DR CONVERTIBLE	182.3 in	74 in	52 in	102 in	3,825 lbs
2019Config 1 of 3	SL CLASS SL63 AMG 2DR CONVERTIBLE	182.7 in	74 in	52 in	102 in	4,068 lbs
2019Config 2 of 3	SL CLASS SL550 2DR CONVERTIBLE	182.3 in	74 in	52 in	102 in	3,957 lbs
2019Config 3 of 3	SL CLASS SL450 2DR CONVERTIBLE	182.3 in	74 in	52 in	102 in	3,825 lbs
2018Config 1 of 4	SL CLASS SL65 AMG 2DR CONVERTIBLE	182.7 in	74 in	52 in	102 in	4,299 lbs
2018Config 2 of 4	SL CLASS SL63 AMG 2DR CONVERTIBLE	182.7 in	74 in	52 in	102 in	4,068 lbs
2018Config 3 of 4	SL CLASS SL550 2DR CONVERTIBLE	182.3 in	74 in	52 in	102 in	3,957 lbs
2018Config 4 of 4	SL CLASS SL450 2DR CONVERTIBLE	182.3 in	74 in	52 in	102 in	3,825 lbs
2017Config 1 of 4	SL CLASS SL65 AMG 2DR CONVERTIBLE	182.7 in	74 in	52 in	102 in	4,299 lbs
2017Config 2 of 4	SL CLASS SL63 AMG 2DR CONVERTIBLE	182.7 in	74 in	52 in	102 in	4,068 lbs
2017Config 3 of 4	SL CLASS SL550 2DR CONVERTIBLE	182.3 in	74 in	52 in	102 in	3,957 lbs
2017Config 4 of 4	SL CLASS SL450 2DR CONVERTIBLE	182.3 in	74 in	52 in	102 in	3,825 lbs
2016Config 1 of 3	SL CLASS SL65 AMG 2DR CONVERTIBLE	182.3 in	74 in	51.2 in	101.6 in	4,299 lbs
2016Config 2 of 3	SL CLASS SL63 AMG 2DR CONVERTIBLE	182.3 in	74 in	51.2 in	101.6 in	4,068 lbs
2016Config 3 of 3	SL CLASS SL550 2DR CONVERTIBLE	181.9 in	74 in	52 in	101.6 in	3,935 lbs
2015Config 1 of 3	SL CLASS SL65 AMG 2DR CONVERTIBLE	182.3 in	74 in	51.2 in	101.6 in	4,299 lbs
2015Config 2 of 3	SL CLASS SL63 AMG 2DR CONVERTIBLE	182.3 in	74 in	51.2 in	101.6 in	4,068 lbs
2015Config 3 of 3	SL CLASS SL550 2DR CONVERTIBLE	181.9 in	74 in	52 in	101.6 in	3,935 lbs

Dimensions sourced from the NHTSA Canadian Vehicle Specifications database. Figures are measured per body style and can vary slightly by trim, wheel package, and suspension.

Mercedes-Benz SL-Class data analysis

How Mercedes-Benz SL-Class overall length varies

Across 21 configurations recorded for the 2015 through 2021 Mercedes-Benz SL-Class, overall length runs from 182 inches to 183 inches. The strongest figure belongs to the 2017 Mercedes-Benz SL-Class (SL CLASS SL63 AMG 2DR CONVERTIBLE) at 183 inches, and the weakest to the 2016 car (SL CLASS SL550 2DR CONVERTIBLE) at 182 inches — a spread of 0%. The narrow spread means any year of the Mercedes-Benz SL-Class in this table behaves much like the others, so you can shop on price, condition and mileage rather than chasing a particular model year.

What changed for 2021

Average overall length for the 2021 Mercedes-Benz SL-Class is 182 inches, against 182 inches for the 2020 car — it held flat. A carry-over year like this usually means no powertrain or structural change, so an older example is the cheaper way into the same specification.

How to read this Mercedes-Benz SL-Class data

This page lists every 2015 through 2021 Mercedes-Benz SL-Class record we hold for this measurement — 21 rows in total, one per configuration and model year rather than a single headline figure. Figures are published as the source agency records them: we do not round, average or interpolate missing years, and a year that is absent from the table is a year with no published measurement rather than a zero. Where a manufacturer offered several drivetrains or body styles in the same year, each appears on its own row, because those variants rarely share the same numbers.

Configurations behind these Mercedes-Benz SL-Class numbers

The 2015 through 2021 Mercedes-Benz SL-Class entries here cover the variants SL CLASS SL550 2DR CONVERTIBLE, SL CLASS SL450 2DR CONVERTIBLE, SL CLASS SL63 AMG 2DR CONVERTIBLE and SL CLASS SL65 AMG 2DR CONVERTIBLE. 2018 is the busiest model year in the record with 4 separate measured configurations, which is why a single quoted overall length figure for that year is rarely the one that matches the car in front of you. Match the row to the exact drivetrain, body style and engine on the window sticker or VIN before relying on the number, and use the comparison links below to see how those same configurations line up against rival models.

Where these Mercedes-Benz SL-Class figures come from

Every value on this page is loaded from federal open data — EPA fuel economy submissions, NHTSA vehicle and crash-test records, and manufacturer specification filings — rather than dealer listings or copied editorial content. The Mercedes-Benz SL-Class record refreshes as the agencies publish, which typically means new model-year rows appear in the autumn and crash-test results follow through the model year as vehicles are tested. Because certification data is filed per configuration, treat any single headline number for this vehicle with caution: the figure that applies to a specific car depends on its engine, drivetrain, body style and model year, all of which are listed separately above. If a number here disagrees with a brochure, the brochure is usually quoting the best available configuration rather than the one being sold.

Will the Mercedes-Benz SL-Class fit your garage and parking space?

Measured against a standard single garage door (8 ft wide, 7 ft tall, 20 ft deep stall) and a standard US surface parking space (9 ft x 18 ft). Measure your own opening before buying — older garages are frequently narrower.

Garage door width

Fits

74 in wide (body only, mirrors folded) — about 22 in of total clearance, so roughly 11 in per side.

Garage door height

Clears

52 in tall — 32 in of headroom before roof rails, antennas, or a roof box are added.

Parking space

Fits a standard stall

182.7 in long leaves 33.3 in to spare in an 18 ft space, and 34 in of side clearance in a 9 ft one.

Its wheelbase (102 in) accounts for about 56% of overall length. A higher share generally means shorter overhangs — better approach and departure clearance on driveways and ramps, and more cabin space for the same parking footprint.

Want to see it against another vehicle at the same scale? Open the car size comparison tool or check the Mercedes-Benz SL-Class curb weight to pair footprint with mass.

Frequently Asked Questions About SL-Class Dimensions

How long is the Mercedes-Benz SL-Class?

The Mercedes-Benz SL-Class is 182.283 inches long, 74.0157 inches wide and 51.9685 inches tall. That is roughly 15.2 feet — compare it with your garage depth before buying.

Will the Mercedes-Benz SL-Class fit in a standard garage?

A standard single-car garage is about 20 feet (240 in) deep and 10 feet (120 in) wide. At 182.283 in long and 74.0157 in wide, the Mercedes-Benz SL-Class fits with 58 in of room to spare front-to-back. Remember to allow for mirrors and door swing.

How much does the Mercedes-Benz SL-Class weigh?

Curb weight for the Mercedes-Benz SL-Class is about 3,957 lbs. Curb weight excludes passengers and cargo, so add roughly 150 lbs per occupant when calculating payload.