RearN/AVerifiedOften listed as 11". W204 saloon (base body) has no rear wiper; both retailers list a rear blade only under the S204 estate, where it is 11"/280mm elsewhere; that is wrong for this car.
ConnectorSide pinLikelywiperblades.co.uk states Side Pin for the front arms; autodoc lists Side Lock, Top Lock and Hook variants together for the model range, so the two domains do not cleanly agree
UK cars are right-hand drive, so the driver's blade is the right-hand one as you face the car — 24", and the passenger blade on the left is 24". There is no rear wiper on this body style.
The front arms take a Side pin fitting: check the pack says that fitting, or that the blade's adapter set includes it. Length alone is not enough — a blade that is the right size but the wrong fitting will not clip on.
Watch for left-hand-drive sets: some Bosch and Valeo twin-packs sold on Amazon.co.uk are the European LHD pairing (longer blade on the left). If the two lengths are the wrong way round for this car, it is an LHD set.
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Does the Mercedes-Benz C-Class W204 have a rear wiper, and what size?
No rear wiper on this body style (Halogen base; xenon optional).
Will a Bosch or Valeo twin pack fit the C-Class?
Yes if it is the UK (RHD) pairing — the longer blade goes on the driver's side, the right. Sets listed for the European market are often the mirror image.
Other cars that use a 24" driver-side blade
13 other cars on this site share this fitting — the passenger side and the fitting usually differ.