XYZ Racing Super Sport Coilovers — Mercedes-Benz SLK R171 8 CYL 2004-2011

The R171 SLK’s front-mid V8 layout puts real weight over the nose the moment you turn in, and factory-spec dampers on a car pushing towards fifteen years old are long past holding that mass in check through a fast B-road sequence. XYZ Racing’s Super Sport coilover kit replaces the ageing spring-and-damper units with a 36-way adjustable monotube setup built for exactly this mix of fast-road driving and the occasional weekend track session.

Height adjustment is independent of damping, so ride height and stiffness stop being a single compromise setting. On the R171 8 CYL that matters – the AMG-adjacent cars sit low from the factory, and getting the stance right without introducing harshness over British B-roads is the actual engineering problem this kit solves.

What this coilover does for your 2004-2011 Mercedes Benz SLK R171 8 CYL

Dial the damping down and the SLK absorbs broken tarmac and speed humps without the crash-through you get from a fixed, over-firm aftermarket spring. Wind it up before a track day and the V8’s nose-heavy weight transfer under braking gets caught earlier, so the front end stops diving and the car turns in with less of the vagueness R171 owners complain about on standard rubber bushes and tired dampers. The 36 damping positions mean you’re not choosing between comfort and control once and living with it – a Sunday commute and a Monday sprint to the circuit can run two completely different setups on the same car. Ride height adjustment lets you correct the SLK’s factory rake or drop it for a lower centre of gravity without touching spring rate, which keeps the geometry sane instead of just slamming the car and hoping.

About the Super Sport coilover

The Super Sport is XYZ Racing’s monotube design aimed squarely at owners who want one damper doing two jobs: daily-usable ride quality and genuine track capability without swapping parts between sessions. The 36-way adjustment range runs from a noticeably softer setting for rough surfaces through to a firm, controlled state for circuit driving, letting the same unit cover both ends of that brief. Ride height is adjustable independently of the damping curve, so lowering the car doesn’t force a compromise on how the damper actually behaves. It’s built to the same monotube construction principle used across XYZ’s range – a single oil chamber for more consistent damping force as the unit heats up under repeated compression cycles, rather than the fade you get from a basic twin-tube unit under sustained use. For an R171 that’s covering both motorway miles and the odd trackday, that construction detail is the difference between a damper that’s still doing its job on lap five and one that’s gone soft.

Fitment for the Mercedes Benz SLK R171 8 CYL (2004-2011)

This kit is specced for the R171-chassis SLK fitted with the 8-cylinder engine, covering the 2004 to 2011 model years – chassis code ME23-2 in XYZ Racing’s fitment system. Confirm your car sits within that production window and carries the V8 powertrain before ordering, as the R171’s 4- and 6-cylinder variants use a different spring and damper specification.

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Spec your ME23-2 SLK R171’s Super Sport kit to the ride height and damping range that suits how you’ll actually drive it – configure yours below.