Mercedes W205 C63 Diffusers
4 products
Choose a C63 rear diffuser by body style first: the C205 coupe has its own flared, model-specific rear end.
Coupe owners can pick a standard carbon diffuser or a finned Brabus-style one. For the sedan, there's a diffuser with an F1-style LED brake light and exhaust tips. The pre-preg dry carbon diffuser with rear splitter is listed for pre-facelift cars and doesn't name a body style, so confirm yours with us before ordering.
Mercedes W205 C63 Diffusers buying guide
Which C63 rear diffuser fits your body style
C205 coupe. The standard coupe diffuser and the Brabus-style diffuser are real carbon fiber and listed for the coupe only. Brabus style names a look borrowed from the German tuner, not a Brabus part. On the coupe the factory diffuser is riveted to the bumper, so fitting the Brabus-style piece means taking the bumper off.
W205 sedan. This diffuser comes with an F1-style LED brake light and exhaust tips and is made for the sedan only. The light needs power, so ask your installer to plan the wiring.
Pre-facelift, body not stated. The pre-preg dry carbon diffuser comes with a rear splitter and a high-gloss, UV-resistant clear coat. It names the C63 and C63 S before the facelift but not a body style, so tell us whether you have a sedan or a coupe.
2019–2021 facelift, wagon and cabriolet
For 2019, Mercedes gave the C63 a new rear diffuser design and redesigned twin tailpipe trims, so our pre-preg set is made for the earlier car. The coupe and sedan listings give 2015–2021 but don't mention the facelift. If yours is a 2019–2021 car, text a photo of the rear bumper to 609-525-4865 first. No diffuser here names the S205 wagon or the A205 cabriolet.
The real carbon diffusers arrive pre-drilled with self-tapping screws. The standard coupe and sedan diffusers need drilling and the Brabus-style one needs the bumper off, so budget for a professional fit. Test-fit before drilling or painting. A drilled diffuser can't be returned, but if one doesn't match the car its listing names, get in touch before fitting it and our fitment guarantee covers the return shipping. To finish the back, add a W205 C63 spoiler.
Frequently asked questions
Will the C205 coupe diffuser fit a C63 sedan?
No. The standard coupe diffuser and the Brabus-style diffuser are both listed for the coupe only, and the coupe's rear end is flared and model-specific. For a sedan, choose the diffuser with the F1-style brake light, or the pre-preg diffuser with rear splitter if your car was built before the 2019 facelift.
Why does the Brabus-style C63 diffuser need the rear bumper off?
On the C63 coupe the factory diffuser is riveted to the rear bumper, so the bumper has to come off to remove it and fit the carbon one. That's why its listing recommends a professional. Check the new diffuser against the car before the old one comes off, because a fitted part can't be returned.
Is there a carbon diffuser for the C63 wagon or cabriolet?
Not one that names them. The listings here cover the W205 sedan and the C205 coupe, plus the pre-facelift pre-preg set, which doesn't state a body. If you drive an S205 wagon or an A205 cabriolet, send a photo of the rear bumper and we'll tell you whether anything here fits. More for the car is on all W205 C63 parts.