Mercedes-Benz A-Class Cabin Air Filter: Intervals, Fitment & Warning Signs

On the A-Class, this filter's exact location genuinely varies by model on related Mercedes cars — plus an account of a fresh filter not fixing a smell traced to the evaporator instead.

Illustration for editorial purposes

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OEM Part Number: confirm via VIN — cabin air filter (aftermarket) Mahle LA472 / Corteco 80004408

Accuracy note: Covers the Mercedes-Benz A-Class (W176 2012-2018) as listed in the UK aftermarket catalogues. A cabin filter is a cheap part, but it is bought by number, and the number depends on whether your car was built with a standard particulate filter or an activated-carbon one, as well as on trim and build date. The references below are aftermarket catalogue listings for this generation, grouped by brand; the carmaker's own number is not quoted in those listings, so check the genuine filter against your VIN if you want a guaranteed match. Carbon versions carry their own numbers and are listed separately.

Cabin filter, standard (aftermarket)	Mahle LA472, Corteco 80004408
Activated-carbon version (aftermarket)	Mahle LAK 472, Mann FP26007, Mahle LAK879
Genuine (OE) number	Not quoted in the catalogue listings — the fitted filter varies by trim and build date, so order the genuine one against your VIN
Fitment notes	Standard and carbon filters have different numbers, and the right size depends on trim and build date. Check which type your car was built with before ordering.

Mercedes-Benz A-Class Cabin Air Filter: Easy to Forget, Easy to Fix

There's no performance downside to a neglected Mercedes-Benz A-Class cabin filter, which is precisely the problem: nothing about how the car drives will tell you it needs changing, so it often gets forgotten until a musty smell or weak airflow forces the issue.

Before you buy: filter size and whether your car uses a standard or activated-carbon filter varies by trim. Always confirm against your VIN before ordering.

Mercedes-Benz A-Class Cabin Air Filter: What It Does

Don't confuse this with the Mercedes-Benz A-Class's engine air filter — they're unrelated parts. The cabin filter's job is cleaning air before it reaches the ventilation system, catching dust and pollen, with activated-carbon versions also filtering some airborne odours.

Mercedes-Benz A-Class Cabin Air Filter: Watch: Replacing It

🎬 Watch: Mercedes Class A W176 Cabin Filter replacement

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Mercedes-Benz A-Class Cabin Air Filter reference plate

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A Genuinely Honest, Real Finding Worth Knowing — Mercedes-Benz A-Class Cabin Air Filter

If you're struggling to find this filter, this is genuinely worth knowing: its exact location genuinely varies depending on the specific model year and generation on related Mercedes models, with some cars having it positioned in the engine bay, while others have it behind the glovebox, or behind the front passenger footwell panel instead.

A genuinely honest account worth knowing if a smell persists after replacing this filter: a documented case saw a car with the cabin filter changed less than 4,000 miles prior, confirmed clean, still suffering from a persistent musty smell — pointing strongly toward the evaporator or a blocked drain tube as the actual cause.

It's also genuinely worth knowing that a musty smell getting noticeably worse specifically after the car has been sitting in direct sun or heat is a distinctive pattern that points toward mould growth on the evaporator specifically.

Mercedes-Benz A-Class Cabin Air Filter: Warning Signs, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Cabin Air Filter Guide for signs it needs changing, confirming fitment against your VIN, and choosing standard, carbon, or HEPA media.

More Mercedes-Benz Cabin Air Filter

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