Mercedes-Benz C-Class W204 bulb types

Dipped: H7 · Main: H7 · Indicators: PY21W · Brake/tail: P21W

2007–2014. UK specification. Halogen base spec unless a row says otherwise — cars with factory xenon or LED headlamps use sealed units for those positions.

Mercedes-Benz C-Class W204

2007–2014 · bulbs9/10 verified

Halogen base; xenon optional

Dip beam (low)H7VerifiedHalogen base spec; Bi-Xenon ILS variants (mainly 2011+ facelift) use D1S instead
Main beam (high)H7VerifiedSame H7 type as dip beam on halogen cars; separate H7 reflector retained on xenon cars
Front fogH11Verifiedagmvision lists H11 (H7 shown only as an alternative for some units); US H8/H11 charts not used
Sidelight / DRLW5WVerifiedSidelight W5W; separate DRL is LED in the headlamp unit (non-replaceable) on UK trims that have it
Front indicatorPY21WVerifiedAmber PY21W (BAU15s) agreed by three domains; some later ILS/xenon headlamp units are listed with PWY24W - check the holder before buying
Rear indicatorPY21WVerifiedAmber PY21W in the outer wing cluster; agmvision and the Hella OE cluster spec agree
Brake / tailP21WVerifiedSeparate P21W brake and P21W tail bulbs in the wing cluster (no P21/5W); facelift LED-look clusters keep the bulb holders
ReverseW16WVerifiedW2.1x9.5d/T15 in the outer body-mounted cluster (the boot-lid lamp carries tail/reflector). Hella OE inner-cluster extract and MBClub UK owners agree; birnen-typ's P21W rejected - that page also wrongly claims LED rear indicators and a C5W plate.
Rear fogP21WVerified
Number plateC5WLikelyNo handbook table reached to settle it

Sources · last checked 11 Sept 2026

Two independent sources agree: birnen-typ.de W204/S204/C204 bulb list; agmvision.com C-Class W204 bulb page (Dip beam (low), Main beam (high), Front fog, Sidelight / DRL, Brake / tail, Rear fog)
Two independent sources agree: birnen-typ.de W204/S204/C204 bulb list; agmvision.com C-Class W204 bulb page; autodoc.co.uk W204 indicator bulb listing (autodoc.co.uk ↗) (Front indicator)
Two independent sources agree: agmvision.com C-Class W204 bulb page; onlinecarparts.co.uk Hella W204 rear cluster spec; autodoc.co.uk W204 indicator bulb listing (autodoc.co.uk ↗) (Rear indicator)
Two independent sources agree: Hella OE W204 rear lamp unit spec; mbclub.co.uk W204 reversing bulb thread (Reverse)
Candidate value from: birnen-typ.de W204/S204/C204 bulb list; agmvision.com C-Class W204 bulb page (Number plate)

Checked by FitsMyCar against the sources above · how we check

Mercedes-Benz's handbooks ↗

Can you fit LED bulbs to the C-Class W204?

Most trims of this car have halogen headlamps. In the UK, a halogen headlamp unit on a car first used on or after 1 April 1986 must not be converted to LED or HID bulbs: the MOT inspection manual (§4.1.4) treats a converted unit as a fail, however bright or well aimed it is. “Retrofit LED H7” bulbs sold for these cars are for off-road use. Halogen upgrade bulbs (+150% and similar) are legal because the unit is unchanged. Sidelights, indicators and number-plate LEDs are a separate question — E-marked LED versions of those are road legal.

Source: MOT inspection manual, section 4 — lamps ↗. Headlamp technology recorded as halogen on most trims, xenon or LED on some — how we check.

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