XYZ Racing Circuit Master Coilovers — Mercedes-Benz C CLASS W205 4 CYL 4WD (Cancellation Kit for Electronic Damping) 2015-2021

The W205 C-Class’s factory 4WD four-cylinder cars came from the factory with electronically controlled damping, which is exactly the system a Circuit Master conversion has to work around rather than fight. This cancellation kit strips out that dependency so the car runs a fully mechanical, driver-set damping platform instead – no control unit fault codes, no half-adjusted compromise between two systems trying to do the same job.

For a chassis that carries 4WD hardware low and forward, sustained circuit lap-time work punishes any softness in body control. The Circuit Master is built for exactly that brief: repeatable, adjustable damping that doesn’t drift session to session the way a stock electronic system tuned for comfort does.

What this coilover does for your 2015-2021 Mercedes Benz C Class

Once the cancellation kit is in and the Circuit Master is set up, the 4WD W205’s front end stops relying on a computer to guess the right damping curve for the next corner – you set it once, mechanically, and it stays there. The 3-knob adjustment layout lets you separate compression and rebound behaviour front to rear, which matters on a 4WD chassis where the driveline adds unsprung mass the standard suspension tune was never built to control precisely. Owners running four-cylinder 4WD C-Class cars on circuit days typically fight body roll and a nose that doesn’t settle quickly enough after trail braking; stiffer, properly matched spring rates and a monotube damper design address both directly. The wide range of adjustment steps means the same kit can be leaned toward a firmer track setup one weekend and backed off for a fast-road drive the next, without swapping parts.

About the Circuit Master coilover

Circuit Master sits at the top of XYZ Racing’s range, built specifically for repeated circuit sessions rather than a single fast lap. Development has run through XYZ’s own racing teams on international circuits, with the damper tuned and re-tuned under actual lap-time conditions rather than on a bench. Each unit offers 9720 individual adjustment combinations across the 3 external knobs, giving genuinely separate control over low-speed and high-speed damping rather than one dial doing everything. The knobs work through a small-oil-hole metering design; on rough sections you may hear a faint noise as oil passes through that restriction under load – that’s the valving doing its job, not a defect, and it has no bearing on circuit performance. Construction and damping response are built around one target: consistent behaviour lap after lap on demanding circuit surfaces, not a soft daily-drive compromise.

Fitment for the Mercedes Benz C Class W205 (2015-2021)

This kit is built for the W205-generation C-Class, four-cylinder engine, 4WD drivetrain, covering the 2015 to 2021 model years, and specifically includes the cancellation kit required to remove reliance on the factory electronic damping control. Confirm your car matches this chassis code and drivetrain spec before ordering, as the cancellation hardware is matched to this exact configuration.

What buyers also search for

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Configure the spec for your W205 below to match the adjustment range to how you’ll actually use the car.