XYZ Racing Circuit Master Coilovers — Mercedes-Benz C CLASS W204/S204 6 CYL (Cancellation Kit for Electronic Damping) 2007-2014

The W204 and S204 C-Class’s biggest complication for a serious coilover fit isn’t spring rate – it’s the electronically adjustable damping fitted as standard to six-cylinder cars in this range. Bolt in a fixed-valve coilover without dealing with that system and the dash lights up with damper faults the ECU can’t resolve, because it’s still hunting for solenoids that no longer exist. This Circuit Master kit is built specifically for that scenario, with a cancellation kit included to silence the factory electronic damping signals so the car runs clean on manual coilovers instead of fighting its own control module.

Circuit Master is XYZ Racing’s dedicated circuit coilover, built around sustained lap-time work rather than a single quick blast or daily-driver comfort. For a rear-wheel-drive six-cylinder C-Class carrying meaningful weight over the front axle under braking, that means damping and spring rates chosen to keep the chassis flat through repeated hard stops and direction changes, not just firmer than standard.

What this coilover does for your 2007-2014 Mercedes Benz C Class W204/S204 6 CYL

With the electronic damping cancelled out, the full range of the Circuit Master’s three external adjustment knobs is actually usable – no factory module second-guessing what the dampers are doing. Around 9720 damping combinations let you separate compression and rebound front and rear until the nose stops diving into braking zones and the rear stays planted on corner exit. Ride height drops through the threaded body, lowering the centre of gravity and sharpening turn-in on a chassis that otherwise carries its mass high for a C-Class of this era. Because the valving is built for sustained circuit sessions, the C-Class holds its set-up through a full track day rather than softening off after a few hard laps, which matters more on this chassis than most given how much the standard suspension leans on electronics to manage body control.

About the Circuit Master coilover

Circuit Master sits at the top of XYZ Racing’s circuit-focused range, developed and run by XYZ’s own racing teams across multiple countries rather than built purely on a bench. The headline figure is roughly 9720 possible damping combinations, reached through the three external adjustment knobs so compression and rebound can be tuned independently to suit a given circuit or driving style. That adjustment range uses a small-orifice valve design optimised for consistent high-load circuit driving, which is also why you may notice a faint noise from the oil passages over sharp bumps or expansion joints on the road – that’s the same valving doing its job under sustained circuit loads, not a fault. This is a coilover built to be driven hard on a track surface first, with road use as the secondary consideration.

Fitment for the Mercedes Benz C Class W204/S204 (2007-2014)

Fits the six-cylinder Mercedes Benz C-Class, saloon (W204) and estate (S204), 2007 to 2014, under chassis code ME06-C. This specific listing is the cancellation-kit variant for cars fitted with electronically adjustable factory damping, and includes the hardware needed to disable that system cleanly when the Circuit Master coilovers go in.

What buyers also search for

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• ME06-C chassis coilover kit for repeated track-day sessions

Spec your six-cylinder W204 or S204 C-Class exactly as it left the factory and pick the damping and ride height that match how you’ll actually use it – configure yours below.