Mercedes-Benz A-Class Tail Lights: Specs, Fitment & Common Faults

A genuinely important finding: LED tail lights genuinely don't produce as much heat as older halogen or xenon units, meaning condensation can linger for much longer — plus an alarming, honest finding that Mercedes-Benz's own used car warranty has been documented not covering tail lights.

Illustration for editorial purposes

OEM Part Numbers

Accuracy note: we weren't able to verify a confident Mercedes-Benz A-Class tail lights part number at the time of writing. Please confirm the correct part via a Mercedes-Benz dealer or parts specialist using your VIN.

More Wiring Behind There Than Most People Assume

A tail light unit typically bundles several functions into one housing — brake light, indicator, reversing light and rear fog light — which means a single electrical fault can affect more than one function at once, and a "faulty tail light" can mean several genuinely different things.

Before you buy: tail light design and bulb type vary by trim and facelift status. Always confirm against your VIN before ordering.

What It Does

Beyond basic rear visibility, tail light units on the A-Class typically integrate brake lights, indicators, reversing lights and rear fog lights into a single housing. Higher trims may use LED units with a distinct light signature, which are not interchangeable with standard halogen units even if the physical mounting looks similar.

Mercedes-Benz A-Class Tail Lights reference plate

Fitment & Compatibility

Tail light design changed between generations of the A-Class, and facelifted versions within the same generation often use a revised light signature that isn't interchangeable with pre-facelift units. Always confirm the exact part for your specific model year before ordering. Whether you're sourcing a replacement tail lights for your Mercedes-Benz A-Class from a dealer, specialist, or online marketplace, always check compatibility against your registration or VIN before buying, and confirm you're ordering the correct side — driver's side (RH in the UK) or passenger side (LH in the UK) — since these are not interchangeable.

A Genuinely Important, Distinctive Finding Worth Knowing

If condensation inside a tail light is lingering for longer than you'd expect, this is genuinely worth knowing: LED tail lights genuinely don't produce anywhere near as much heat as older halogen or xenon units did, meaning condensation that would have quickly burned off on an older car can genuinely linger for much longer on a modern LED-equipped one, sometimes remaining even after a long motorway drive. Worth knowing this is a documented characteristic of LED lighting generally, rather than necessarily a sign of a genuine fault, provided the condensation is light misting rather than actual water droplets or standing water.

A genuinely useful, temporary fix worth knowing: removing the bulb holder and blowing a hairdryer directly into the resulting opening is a documented way to help drive out some of the trapped damp air. Worth knowing this is explicitly a temporary circumvention rather than a permanent cure, and may need repeating as the weather cools or the light cools down again overnight.

It's also genuinely worth knowing an alarming, honest finding worth checking on a used car specifically: Mercedes-Benz's own used car warranty has been documented explicitly not covering tail lights in at least one case, worth checking the exact terms of any used car warranty rather than assuming this specific component is automatically covered if a fault develops.

Common Faults, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Tail Lights Guide for diagnosing which circuit has failed, how easy this job is to DIY, and aftermarket advice.

More Mercedes-Benz Tail Lights

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