XYZ Racing Tarmac Rally Coilovers — Mercedes-Benz C CLASS W205 6 CYL 4WD (Cancellation Kit for Electronic Damping) 2015-2021

Tarmac rally stages break cars in ways a circuit never will: broken camber changes, mid-corner compressions, ridges thrown up by the cars ahead of you. The six-cylinder W205 C-Class – C400, C450 and C43 AMG among them – carries real weight over its nose once 4MATIC hardware and a biturbo V6 sit ahead of the firewall, and it left the factory with electronically controlled damping built into that chassis balance. XYZ Racing’s Tarmac Rally coilover replaces that damping logic with a fixed mechanical setup, and this particular kit includes the cancellation module needed to run it without the ECU flagging a fault.

That matters because a rally-spec 4MATIC C-Class needs damping that reacts to broken surfaces instantly, not damping that’s waiting on a control unit to interpret sensor data mid-stage. Swapping to XYZ’s mechanical dampers takes that variable out of the equation entirely.

What this coilover does for your 2015-2021 Mercedes Benz C CLASS W205 6 CYL 4WD (Cancellation Kit for Electronic Damping)

On a car this heavy over the front axle, damping quality decides how much of that mass stays planted through a compression rather than crashing through it. The Tarmac Rally kit’s valving is set up to soak up sharp-edged bumps and pavement breaks without kicking the body upright and unsettling the rear, which keeps the 4MATIC system’s traction advantage usable rather than wasted on a car that’s skipping over ridges. Suppressing that secondary body movement after a big hit also keeps the tyre’s contact patch loaded through the next input, so the six-cylinder engine’s torque actually reaches the road instead of spinning through a compressed spring. Height adjustment lets you set the C-Class’s stance to match a stage’s ground clearance needs without touching spring preload, and the stiffer overall platform reduces the roll and pitch that a stock-damped W205 shows under hard direction changes.

About the Tarmac Rally coilover

XYZ Racing built the Tarmac Rally line specifically around sealed-stage work on broken and patched public tarmac, not billiard-table circuit surfaces. The valving is tuned to shrug off big hits – potholes, camber steps, mid-corner compressions – without transmitting that impact straight into the chassis, and to calm the body back down quickly once it’s absorbed rather than letting it float or pogo into the next section. That control keeps the tyre pressed into the road through the part of the corner where grip actually gets used, which is the whole point on a stage where you can’t see what’s coming next. The damping settings themselves come out of XYZ’s own tarmac rally programme rather than a generic road-and-track compromise, so the kit behaves the way a car set up for rally pace needs to, not the way a track-day car does.

Fitment for the Mercedes Benz C CLASS W205 6 CYL 4WD (Cancellation Kit for Electronic Damping) (2015-2021)

This kit is built for the W205-chassis C-Class, six-cylinder 4MATIC variants, covering the 2015 to 2021 model years. It’s specified with the cancellation kit required to disable the car’s factory electronic damping control, so the mechanical coilovers install and run without triggering suspension warning faults on the dash.

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Pick your damping and ride-height spec for the W205 below and configure yours to match the stage you’re running.