Mercedes-Benz A-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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OEM Part Number: confirm via VIN — aftermarket LH Hella 1LG 010 818-131 / RH Hella 1EG 010 818-121
| Passenger side (LH / nearside) headlight — aftermarket | Van Wezel 3019961H (halogen H7/H15, DRL, electric motor, not for facelift); Hella 1LG 010 818-131 (halogen H7, H15, PY21W, DRL, motor); Magneti Marelli 710301241203 (halogen H7/H7, PY21W, W5W, pneumatic levelling); Hella 1EX 354 879-011 (LED, DRL); Hella 1EX 015 091-811 (LED, DRL); Van Wezel 3019985H (xenon D3S/H7, LED DRL, motor) |
|---|---|
| Driver's side (RH / offside) headlight — aftermarket | Van Wezel 3019962H (halogen H7/H15, DRL, motor, not for facelift); Hella 1EG 010 818-121 (halogen H7, H15, PY21W, DRL, motor); Diederichs 1682080 (halogen H7, H15, PY21W, DRL, motor); Hella 1EX 354 879-021 (LED, DRL); Hella 1EX 015 091-821 (LED, DRL); Van Wezel 3019986H (xenon D3S/H7, LED DRL, motor) |
| Bulb types | dipped H7, daytime running H15, indicator PY21W, sidelight W5W; bi-xenon D3S/H7 or D1S/H7; LED units take no bulbs |
| Genuine (OE) numbers quoted | None quoted in catalogue listings — order genuine units against your VIN |
| Fitment notes | Halogen, bi-xenon and LED units are all listed, with a pre-facelift and facelift split (Van Wezel 3019961H/3019962H are not for the facelift, 3018961 is for the facelift), so match the unit to the car's year. |
A Genuinely Important UK Rule Worth Knowing Before You Buy — Mercedes-Benz A-Class Headlights
If your A-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.
Mercedes-Benz A-Class Headlights: Watch: Replacing It
W176 H7 bulb change
Mercedes-Benz A-Class Headlights: What It Does
The Mercedes-Benz A-Class'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 A-Class Headlights: Generations, Derivatives & Headlight Type
| Standard trims | LED headlights are standard on current generations, with halogen fitted to older models |
|---|---|
| Higher trims/AMG Line | MULTIBEAM LED is offered as an option — genuinely check for "MULTIBEAM LED" text printed on the unit itself to confirm fitment before ordering, since VIN decoders don't always distinguish reliably |
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Mercedes-Benz A-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.