Mercedes C Class wheel fitment — T-Model 203K

By Torque, AIWheelTech vehicle & fitment specialist · 2006–2011

Before you buy wheels, the Mercedes C Class wheel fitment facts: The Mercedes C Class T-Model 203K (2006–2011) uses a 5x112 bolt pattern, 66.6 mm centre bore, M12x1.5 bolts torqued to ~110 Nm. It accepts ~6.5J–8J wheels at ET22–ET38 front; staggered setups run 8J–11J rear (ET20–ET37).

Mercedes C Class wheel fitment

Mercedes C Class wheel fitment comes down to two things: the factory hub spec, and how far the aftermarket width and offset can move from it. Both are here for the Mercedes C Class T-Model 203K (2006–2011).

Aftermarket wheel sizes — read per position:

Width and offset move together: roughly 8 to 10 ET more for every extra 1J keeps the wheel inside the arch. Final offset and any spacer come from the fit-check.

Overview

The Mercedes-Benz W203 is the second generation of the compact executive car series, introduced in March 2000 with production beginning in March 1999. It succeeded the first-generation W202 and was available as a sedan, station wagon, and liftback body styles. The W203 featured an extended range of engines including inline-four and V6 petrol engines alongside inline-four and -five diesel options, with later models receiving a V6 diesel engine. Notably, this generation saw the introduction of common rail direct fuel injection for diesel variants and variable geometry turbochargers. A six-speed manual gearbox was optional on some models except for the C320 and C32 AMG.

UK popularity & demand

Based on DfT VEH0124 vehicle-parc data (2025), there are approximately 340,482 Mercedes C Class on UK roads, placing it in the top 1% of car models by volume across our fitment database.

A parc that size is why Mercedes C Class wheel fitment is worth getting exactly right: a lot of owners are shopping for these numbers.

Source: DfT/DVLA licensed-vehicle statistics (VEH0124), matched to the AIWheelTech fitment database.

History & notable variants

The W203 received several updates during its production run, including a facelift in 2005 which introduced new LED taillights, revised dashboard layout, and updated front fascia. The generation also saw the introduction of the SportCoupé variant (CL203) that was later renamed to Mercedes-Benz CLC-Class before being discontinued in 2011.

Dimensions

Source: EU type-approval data (EEA).

Body styles & production

Trim levels

Factory colours

Reliability & owner notes

• Pros: Extended range of engines; introduction of common rail direct fuel injection for diesel variants
• Cons: Number designations no longer equivalent to engine displacement post-2005
• Common issues: No specific reliability issues mentioned