Mercedes-Benz CLA 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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OEM Part Number: confirm via VIN — aftermarket LH Hella 1EX 015 086-311 / RH Hella 1EX 015 569-621
| Passenger side (LH / nearside) headlight — aftermarket | Van Wezel 2927961M (halogen H7/H15, DRL, no motor, electric levelling cars); Magneti Marelli 710301279203 (halogen H7, H15, PY21W, no motor); Diederichs 1682281 (halogen H7, H15, PY21W, with bulbs); Van Wezel 2927985M (bi-xenon D3S with LED, auto levelling cars, no motor, no control unit); Diederichs 1682285 (bi-xenon D3S with LED, bulbs included); Magneti Marelli 711307024240 (bi-xenon D3S with LED, bulbs included) |
|---|---|
| Driver's side (RH / offside) headlight — aftermarket | Van Wezel 2927962M (halogen H7/H15, DRL, no motor, electric levelling cars); Magneti Marelli 710301279204 (halogen H7, H15, PY21W); Diederichs 1682280 (halogen H7, H15, PY21W, with bulbs); Van Wezel 2927986M (bi-xenon D3S with LED, auto levelling cars, no motor); Diederichs 1682284 (bi-xenon D3S with LED, bulbs included); Magneti Marelli 711307024241 (bi-xenon D3S with LED, bulbs included) |
| Bulb types | dipped H7, daytime running H15, indicator PY21W; bi-xenon D3S; LED units take no bulbs |
| Genuine (OE) numbers quoted | None quoted in catalogue listings — order genuine units against your VIN |
| Fitment notes | Halogen, D3S bi-xenon and full LED units are listed, and the xenon units are sold without the xenon control unit; the Hella multibeam unit 1EX 015 086-511 needs the adaptive lighting control unit. |
A Genuinely Important UK Rule Worth Knowing Before You Buy — Mercedes-Benz CLA Headlights
If your CLA 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.
Mercedes-Benz CLA Headlights: Watch: Replacing It
The CLA C117 shares the W176 A-Class platform and headlight bulb access
Mercedes-Benz CLA Headlights: What It Does
The Mercedes-Benz CLA's headlight unit houses the main and dipped beam bulbs (or LED/matrix modules on higher trims), positioned and angled to illuminate the road ahead without excessively dazzling oncoming traffic. Many modern units also integrate the daytime running light and front indicator into the same housing, which affects both the part number and the complexity of any repair.
Mercedes-Benz CLA Headlights: Generations, Derivatives & Headlight Type
| Standard trims | LED headlights are standard, with halogen fitted to older/entry examples |
|---|---|
| AMG Line/higher trims | MULTIBEAM LED is offered as an option — check the unit itself for "MULTIBEAM LED" text or confirm via VIN before ordering, since it's not standard even on well-equipped cars |
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Mercedes-Benz CLA 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.