XYZ Racing Super Sport Coilovers — Mercedes-Benz SLK R171 4/6 CYL 2004-2011

The R171 SLK’s short wheelbase and folding hard-top mass sitting high behind the cabin make ride quality and body control a genuine trade-off on UK B-roads, and it’s one most owners never get to test because the factory setup was tuned soft for US-market comfort. The Super Sport coilover for the SLK R171, spanning both 4-cylinder and 6-cylinder cars from 2004 to 2011, is built for fast-road driving with regular track days mixed in, not a car that lives exclusively on circuit.

Ride height adjustment lets you correct the factory’s slightly nose-up stance and get the SLK sitting level, which matters on a car where the roofline and proportions are already tight. Because the range covers both engine variants, the spring rates and valving are matched to the actual weight sitting over the front axle rather than a single generic setup for the whole R171 line.

What this coilover does for your 2004-2011 Mercedes Benz SLK

Fitting this kit tightens up the vague, wallowy transitions the SLK shows on rougher B-roads, where the standard dampers run out of control before the springs do. The 36-way damping adjustment means you can back the compression off for a daily commute and firm it up again the night before a track session, without swapping parts. Lowering the ride height also drops the centre of gravity on a car whose folding roof mechanism already adds weight up top, which sharpens turn-in response noticeably compared to the standard setup. Because the kit is specced separately for 4-cylinder and 6-cylinder R171s, the corner weights front-to-rear are already accounted for rather than something you have to compensate for with spring choice later. The result on a well-sorted SLK is a car that changes direction with less roll and holds a line through a fast sweeper instead of wallowing mid-corner.

About the Super Sport coilover

The Super Sport damper was developed to solve the discomfort that comes from running a firm coilover on UK roads that are rarely smooth for long. It carries 36 individual damping adjustment positions, giving a genuinely usable spread between a setting soft enough for broken tarmac and one firm enough for a track surface, rather than a narrow band clustered around one compromise. Ride height is independently adjustable, so lowering the car doesn’t force you to accept whatever spring preload the kit ships with. Mercedes Benz specifies the SLK’s suspension geometry with a fairly narrow tolerance for camber and ride height change, and this coilover’s height adjustment is built to work within that rather than fighting it. The construction is intended to cope with the demands of a weekend spent on circuit one week and a daily commute the next, which is the actual use pattern for most R171 owners running this spec rather than a car kept permanently at one ride height and one damper setting.

Fitment for the Mercedes Benz SLK R171 (2004-2011)

This kit is built to the R171 chassis code and covers the full production run from 2004 to 2011, with separate specification for 4-cylinder and 6-cylinder engine variants to match the different weight distribution each carries over the front axle. Confirm your SLK’s engine variant before ordering, since the two use different spring rates within this same Super Sport range.

What buyers also search for

• Mercedes Benz SLK R171 coilover kit for fast road and occasional track use
• SLK R171 ride height adjustment for a level, planted stance
• Mercedes Benz SLK suspension upgrade with separate 4-cylinder and 6-cylinder spring rates
• R171 SLK damping that copes with UK B-roads as well as a track surface
• Super Sport coilover options for daily-driven Mercedes SLK R171

Configure your Super Sport spec for the SLK R171 below to match it to your exact engine variant.