XYZ Racing Circuit Master Coilovers — Mercedes-Benz C CLASS W204 4 CYL (Modified Rear Integrated) 2007-2014

The W204 C-Class’s standard suspension is tuned for comfort first, and on the four-cylinder cars that shows up as body roll and nose dive the instant you trail-brake into a corner. The XYZ Racing Circuit Master coilover for the Mercedes Benz C Class W204 4 CYL (Modified Rr Integrated) replaces that give with a monotube set-up built around 9720 discrete adjustment combinations, so the front strut and the modified rear integration work with each other through the corner instead of against it.

Circuit Master sits at the top of XYZ’s range for a reason: it is built for sustained circuit lap-time work, not a once-a-year track day where the car is really just commuting with a helmet in the boot. On the W204’s chassis, that means a rear end that holds its geometry as heat builds and grip windows shift, from the first flying lap to the last.

What this coilover does for your 2007-2014 Mercedes Benz C Class W204

Fitted to the 4-cylinder W204, the Circuit Master kit gives you three external adjustment knobs per corner, which is enough range to separate low-speed compliance for kerb-riding from high-speed control for compressions without one setting compromising the other. The modified rear-integrated mounting keeps the rear axle working in concert with the front strut rate, which cuts the mid-corner rear-step that stock C-Class suspension is known for under hard cornering loads. Ride height is adjustable independently of spring preload, so you can correct the W204’s factory rake and get consistent corner weights before you touch damping at all. Because the whole kit is monotube, damping force stays consistent as oil temperature climbs across a session, rather than fading away on lap six the way twin-tube set-ups often do on this platform.

About the Circuit Master coilover

XYZ built Circuit Master as its circuit-focused range, and it is the version their own teams run and develop against in international events. The defining feature is the adjustment range itself: 9720 possible combinations across the three external knobs, which is a genuinely wide window for matching the kit to a specific track surface or tyre compound rather than picking between a handful of preset clicks. Construction uses a small-orifice oil-flow design inside the damper body to give that fine-grained control; on rough sections or expansion joints you may hear a faint noise through the passage as oil moves through it, which is a normal characteristic of this design and not a fault. The kit is built specifically with circuit use in mind, so occasional track-surface noise is expected rather than something to chase out.

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

This kit is built for the W204-generation C-Class 4-cylinder cars, chassis code ME05-1, covering the 2007 to 2014 production run with the modified rear-integrated mounting configuration. Confirm your car sits within this chassis and year span before ordering, as the rear mounting hardware is specific to this modified-integration variant rather than the standard W204 rear end.

What buyers also search for

• Mercedes Benz C Class W204 coilover upgrade for circuit and trackday use
• W204 4-cylinder damping that holds its setting across a full track session
• Mercedes C Class Circuit Master adjustable coilovers for the modified rear-integrated chassis
• W204 ride height and corner-weight correction before a track build

Pick your damping and ride-height spec for the ME05-1 W204 below and build the kit for your car’s exact configuration.