Mercedes-Benz SLK280 Map Light Bulb Size

The Mercedes-Benz SLK280 map light requires bulb size 12961 or H6W depending on the specific version installed in the vehicle. Data for the provided bulb sizes covers the range from 2006 to 2008.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2007-2008	12961 (Front and Center)
2006	H6W

Bulb Specifications

Description	Bulb Size
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961
ECE standard (Europe & worldwide). Single-filament signalling bulb with BAX9s base. 12V, 6W.	H6W

Other Locations

Additional Notes

The Mercedes-Benz SLK280 uses two distinct bulb types across its model years for map lighting: the 12961 and the H6W.
The 12961 is a Philips part number designation for a miniature wedge-style T10 bulb with a W2.1x9.5d base, rated at 12V and 5W.
The H6W follows ECE standards, which govern lighting regulations across Europe and much of the world. It is a single-filament signalling bulb with a BAX9s base, rated at 12V and 6W.
The W2.1x9.5d base of the 12961 and the BAX9s base of the H6W are physically incompatible, meaning the two bulb types are not interchangeable.
The BAX9s base uses offset pins to secure the bulb, while the W2.1x9.5d base relies on a wedge-style fit with no separate locking pins, further distinguishing the two mounting systems.
The 2007-2008 SLK280 uses the 12961 bulb for both the front and center map light positions.
The 2006 SLK280 uses the H6W bulb for map lighting, which draws 6W compared to the 5W draw of the 12961 used in later model years.