XYZ Racing Street Advanced Coilovers — Mercedes-Benz SLK R171 4/6 CYL 2004-2011

The R171 SLK’s folding steel hardtop sits behind the rear axle, and that extra mass is aft of where a roadster chassis wants it – as the factory dampers age, the car starts to squat under acceleration and pitch into corners instead of holding a flat line. The XYZ Racing Street Advanced coilover kit for the Mercedes Benz SLK R171 4/6 CYL replaces that tired setup and hands the choice of ride firmness back to the driver.

Street Advanced is built for owners running the SLK as a fast-road car with the occasional track day rather than a dedicated circuit weapon, and it covers both jobs through adjustable ride height and damping instead of one fixed compromise. Whether the car under the folding roof is a four-cylinder kompressor or the heavier six-cylinder SLK350, the front end’s extra load is dealt with the same way: by putting compression and rebound control directly in your hands.

What this coilover does for your 2004-2011 Mercedes Benz SLK R171 4/6 CYL

Dropping the ride height lowers the centre of gravity the retractable hardtop pushes upward when stowed, tightening turn-in without disturbing the roof mechanism’s shut lines. The 720-way damping adjustment gives enough spread to run the SLK soft over broken UK B-roads through the week, then firm the front and rear independently before a track session, rather than living with a single setting all year round. On the six-cylinder SLK350, the added weight over the front axle tends to push the nose wide under trail braking; winding in more front compression pulls that dive back and lets the rear tyres do more of the cornering work. On the four-cylinder kompressor cars, the lighter nose means the same kit can run softer up front while still keeping the body settled through direction changes – useful on a car whose folding roof already asks a lot of the rear structure every time it cycles. Height and damping are set independently front and rear, so a lowered stance doesn’t have to mean a compromised ride.

About the Street Advanced coilover

Street Advanced is XYZ Racing’s most widely fitted coilover line, refined over years of development and validated through the brand’s involvement in racing programmes worldwide before being brought down to road-legal spec. Rather than a single fixed valving, it’s built around 720 individual damping positions, giving a far finer graduation between comfort and control than a basic two-way adjustable kit allows. It’s aimed squarely at drivers who use one car for both a daily commute and a track day, rather than owners chasing outright lap time – the adjustment range is there to let the same kit do a supermarket run on Monday and a track day on Saturday. For an SLK that’s kept as a proper driver’s car rather than a garage ornament, that range matters: you can dial in comfort for the school run and stiffen everything up again before the next trackday booking, without changing a single component.

Fitment for the Mercedes Benz SLK R171 4/6 CYL (2004-2011)

This kit is built for the R171-generation SLK, covering both four-cylinder and six-cylinder variants produced between 2004 and 2011. Confirm your car sits within that year range and chassis code (ME23-1) before ordering, since suspension mounting points and geometry can change between four- and six-cylinder variants of the same generation.

What buyers also search for

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• Mercedes SLK lowering kit for daily driving and occasional track days

This is a made-to-order kit matched to your exact R171 SLK variant – configure yours below to get the spec that suits how you actually use the car.