XYZ Racing Pro Rally Coilovers — Mercedes-Benz S CLASS W221 (NON ABC hydraulic or 4WD) 2006-2013

The W221 S-Class was engineered around Airmatic and, on the top-spec cars, ABC hydraulics – which is precisely the system this kit replaces. Once the air struts start weeping and the dealer quote lands somewhere north of four figures a corner, a proper coilover conversion stops being a modification and starts being the sensible long-term fix for a two-tonne luxury saloon that still has plenty of life left in it.

The XYZ Racing Pro Rally coilover is the loose-surface end of the XYZ range, but on a road car it translates into a long-travel, high-compliance setup that suits the W221’s mass and wheelbase far better than a stiff circuit spring would. For a rear-wheel-drive S-Class running 18 or 19-inch wheels, the priority is body control without losing the long-distance gait that made you buy the car in the first place.

What this coilover does for your 2006-2013 Mercedes Benz S Class W221 (NON ABC Hydraulic Or 4WD)

Swapping from a tired Airmatic setup to a mechanical coilover restores predictable, repeatable damping – no more morning sag, no more compressor hunting at idle, no more fault codes when the rear bags finally give up. The Pro Rally’s long-stroke damper geometry preserves the W221’s wheel travel, so speed bumps and motorway expansion joints stay absorbed rather than thumping through to the cabin. Independent height adjustment at each corner lets you dial the rear back up to factory rake after years of squat, and the 30-way bump and rebound circuits give you a quiet, supple setting for daily duties and a tighter setting for when the car is loaded with four passengers and luggage. Pillow-ball top mounts sharpen on-centre steering response, which the W221’s variable-ratio rack benefits from significantly.

About the Pro Rally coilover

XYZ Racing builds the Pro Rally on a monotube damper body with separate bump and rebound adjustment – 30 clicks on each circuit, giving a wide working window for a heavy chassis like the W221. Spring rates are chosen with travel in mind rather than outright stiffness, which is the right call for a car carrying a long-nose V8 or V12 over a 3,165 mm wheelbase. The damper bodies are CNC-machined and hard-anodised, the spring perches run on PTFE-impregnated thrust bearings, and the camber-adjustable pillow-ball top mounts are rebuildable rather than sealed. Height is set on the lower bracket rather than by winding the spring perch down, so preload stays correct as you drop the car. Stainless brake-line brackets and OE-style ABS sensor tabs are part of the strut, not an afterthought.

Fitment for the Mercedes Benz S CLASS W221 (NON ABC hydraulic or 4WD) (2006-2013)

This kit is specific to the W221 S-Class on conventional rear-wheel-drive Airmatic – chassis code ME35, model years 2006 to 2013. It is not for cars equipped with ABC (Active Body Control) hydraulics, nor for 4MATIC four-wheel-drive variants; both use entirely different front strut geometry and rear suspension hardpoints.

What buyers also search for

• Mercedes W221 S-Class coilover conversion to replace failed Airmatic struts
• S-Class W221 suspension upgrade that keeps ride quality on motorway journeys
• W221 rally-spec coilover with long travel for British B-roads and broken tarmac
• Pro Rally damping for heavy executive saloons running 18-19 inch wheels
• W221 height-adjustable coilover with pillow-ball top mounts and rebuildable parts

Pick your spring rates, top-mount style and damping preference in the configurator below.