2008 Mercedes-Benz SLK (R171, facelift 2008) Dimensions, Size & Specs

The width of the Mercedes-Benz SLK R171 facelift ranges from 1777 mm to 1788 mm (69.9 to 70.4 inches) when measured across the car body itself. However, when the side mirrors are opened, the width increases to approximately 2005 mm, which is about 79 inches or 6 feet 7 inches. This extended width includes the driving mirrors and should be considered when parking or maneuvering in tight spaces.

The height of the Mercedes-Benz SLK R171 facelift varies between 1271 mm and 1298 mm, which translates to approximately 50 to 51.1 inches, or about 4 feet 2 inches to 4 feet 3 inches. This low height contributes to the roadster's sporty stance and aerodynamic profile while providing a driver-focused, sleek cabin appearance.

The curb weight of the Mercedes-Benz SLK R171 facelift varies between 1315 kg and 1500 kg (approximately 2,899 to 3,307 pounds), depending on the specific model and equipment. The maximum allowable weight, including passengers and cargo, ranges from 1705 kg to 1850 kg (3,759 to 4,078 pounds). This weight range reflects the compact, lightweight design typical for roadsters, balancing performance and efficiency.

The Mercedes-Benz SLK R171 facelift offers a luggage capacity of 208 liters (about 7.3 cubic feet). This is a reasonable amount for a compact roadster and sufficient to carry small suitcases or weekend bags. Compared with similar roadsters, the SLK provides competitive luggage space, though typically less than larger convertibles or coupes due to its compact design and folding hardtop mechanism.

Yes, the Mercedes-Benz SLK R171 facelift can comfortably fit into a standard residential garage. With a length of approximately 4.1 meters (13.5 feet), width under 2 meters (6.6 feet) including mirrors opened, and a height just under 1.3 meters (4.3 feet), it is smaller than typical garage dimensions, which are usually at least 6 meters (20 feet) long, 3 meters (10 feet) wide, and 2.1 meters (7 feet) high. Its compact size makes parking and storage convenient even in tighter spaces.

The Mercedes-Benz SLK R171 facelift supports a range of rim sizes including 16-inch rims (7 J x 16), through various 17 and 18-inch configurations (up to 18-inch 7.5 J). Tire sizes vary accordingly, from 205/55 R16 to 245/35 R18. These varying sizes allow for tailored setups balancing ride comfort, handling precision, and sporty aesthetics. Larger rims and wider, lower-profile tires generally improve grip and steering response, while smaller wheels prioritize ride comfort.

Compared to its predecessor, the original SLK R170, the R171 facelift introduced in 2008 maintains a similar compact footprint with only slight variations in length, width, and height. The R171 features more modern styling updates including redesigned bumpers, headlamps, and tail lamps that give it a fresher and sportier look. Dimensionally, both generations fall in the same compact roadster category, but the facelifted R171 benefits from improved aerodynamics, a slightly stiffer chassis, and refined interior ergonomics, making it a more enjoyable and practical driving experience.

The Mercedes-Benz SLK R171 facelift is comparable in size to other popular roadsters like the BMW Z4 E85 (2002-2008) and the Audi TT Mk2 (2006-2014). With a length of around 4.1 meters and a width of about 1.78 meters (excluding mirrors), the SLK is slightly smaller or similar in footprint compared to these competitors. It stands out due to its retractable hardtop roof, which provides coupe-like security and comfort, a feature less common in most rivals at the time. Its sporty yet luxurious interior and strong brand prestige also differentiate it within the premium compact roadster market.

The maximum roof load capacity for the Mercedes-Benz SLK R171 facelift is 50 kilograms (about 110 pounds). This capacity is relevant primarily when the hardtop roof is closed, indicating how much weight it can safely support, such as roof racks or cargo boxes. Exceeding this limit can damage the roof mechanism or affect structural integrity. The specified roof load allows for moderate additional gear when needed but is lower compared to larger SUVs or wagons designed for heavy roof cargo.