XYZ Racing Circuit Master Coilovers — Mercedes-Benz C CLASS W205 8 CYL 4WD (Cancellation Kit for Electronic Damping) 2015-2021

The W205 C63’s nose carries the full weight of Mercedes-AMG’s 4.0-litre twin-turbo V8, and on a car specced with factory adaptive damping, that mass moves through the standard AMG Ride Control system before you ever get near a corner. XYZ Racing’s Circuit Master coilover for this ME07-9-C chassis is built with a cancellation kit that removes the electronic damping module from the equation entirely, replacing it with a fixed mechanical damper you tune by hand.

For a 4WD C-Class run on circuit days rather than the daily commute, that swap matters more than most spec sheets let on. Circuit Master is XYZ Racing’s dedicated track range, built for sustained lap-time work rather than one fast lap and a cool-down.

What this coilover does for your 2015-2021 Mercedes Benz C Class W205

With the factory electronic damping cancelled and the Circuit Master kit fitted in its place, you get 9720 discrete combinations of compression and rebound across three separate adjustment knobs, enough range to move from a soft, compliant setting for a cold-tyre out-lap to something considerably stiffer once the V8’s weight is loading the front axle under braking. Ride height drops through the threaded body, letting you correct the nose-heavy stance the standard adaptive setup was designed to mask, and pull the centre of gravity down for flatter transitions through direction changes. On a 4WD C-Class sending power to all four corners, tightening the damper curve also sharpens how quickly load transfers from front to rear under throttle, giving the drivetrain a more settled platform to put power down through. None of this costs you the adjustability that made the factory system appealing in the first place – you are simply setting it by hand, session by session, instead of leaving it to a control unit.

About the Circuit Master coilover

Circuit Master sits at the top of XYZ Racing’s range, developed and run by XYZ’s own racing teams across international circuits before it reaches a road car. The headline figure is 9720 possible damping combinations, split across three external knobs so compression and rebound can be set independently rather than compromising on one global curve. That resolution is deliberate – it’s built for drivers who will actually use every click, not leave the dial wherever it arrived. Internally the damper uses a small-oil-hole passage through the valving, which is part of how it achieves such fine adjustment steps; over sharp bumps or kerbs this can produce a faint noise as oil moves through the narrower passage, which is normal and not a fault. The kit is built specifically for circuit-track use, meaning the components are set up for repeated hard cycles at the track rather than optimised purely for road comfort, with the cancellation kit fitted here so the mechanical damper isn’t fighting the W205’s factory electronic module.

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

This kit is built for the Mercedes Benz C Class W205, chassis code ME07-9-C, covering the 2015 to 2021 model years. It’s specified for the 8-cylinder 4WD variant and includes the cancellation kit required where the car left the factory with electronic damping, so no additional module needs sourcing separately.

What buyers also search for

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• Circuit Master coilover options for the Mercedes Benz C Class track build

Trim and options vary between individual W205 cars, so check your spec against the fitment details above and configure yours below.