Mercedes-Benz C-Class Headlights: Specs, Fitment & Common Faults

Bulb type, unit part numbers, and the faults that actually cause that flickering or dim light you've noticed.

Illustration for editorial purposes

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Mercedes-Benz C-Class Headlights: OEM Part Number

Accuracy note: genuinely worth knowing: C-Class headlight units with condensation inside the lens are a common complaint, and it's not always a sign the unit needs full replacement — a failed seal can sometimes be resealed rather than requiring a new headlight, worth checking before assuming the whole unit is beyond repair.

A Genuinely Important UK Rule Worth Knowing Before You Buy — Mercedes-Benz C-Class Headlights

If your C-Class has factory-fitted halogen headlamp housings, converting them to fit LED bulbs is treated as a definite MOT failure under the current inspection manual — this isn't a grey area or a minor advisory, since a housing designed for halogen doesn't distribute an LED bulb's light output correctly, which can genuinely dazzle oncoming drivers. If you want a genuine LED upgrade, the correct route is a complete headlight unit designed for LED from the factory, not a bulb swap into an existing halogen housing.

Before you buy: matrix LED, adaptive, and cornering headlight systems often require electronic coding to the car after a unit swap, even for a genuine like-for-like replacement — a headlight that isn't recognised by the car's electronics can trigger warning lights or fail to auto-level correctly. Check whether your specific trim has one of these systems before assuming a straightforward bulb-in, bulb-out job.

Mercedes-Benz C-Class Headlights reference plate

Mercedes-Benz C-Class Headlights: What It Does

On the Mercedes-Benz C-Class, the main and dipped beams, whether conventional bulbs or LED/matrix modules on higher trims, sit inside the headlight unit at an angle calculated to illuminate the road without dazzling other drivers. Many modern units also combine the daytime running light and indicator into that same housing, adding a layer of complexity to both part numbers and repairs.

Mercedes-Benz C-Class Headlights: Generations, Derivatives & Headlight Type

W204 (2007–2014), standard trims	Halogen, chrome housing
W205 (2015–2018), standard trims	Static LED — confirmed as a genuinely different, non-interchangeable system from the optional adaptive version
W205, optional	"Intelligent Light System" (ILS) adaptive LED — check for SA code 640 or "MULTIBEAM LED" text on the unit itself to confirm which your car has before ordering
W205 facelift (2019–2021)	Genuinely upgraded and rebranded "MULTIBEAM LED" system using more individual LED chips (84 per headlight) for more precise light control — functionally similar to pre-facelift ILS but with different housings and electronics, not a direct swap

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Mercedes-Benz C-Class Headlights: Common Faults, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Headlights Guide for the four bulb technologies and how they differ, UK law on aim and modifications, common faults to check for, how difficult this job is to DIY, and confirming fitment against your VIN.

More Mercedes-Benz Headlights

The same part, covered across other Mercedes-Benz models.