Mercedes-Benz SLK350 Map Light Bulb Size

The Mercedes-Benz SLK350 map light utilizes 12961 and H6W bulb sizes depending on the specific vehicle configuration and production requirements for the interior lighting system. Provided data covers the range from 2005 to 2016 for the specified automotive lighting components.

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
2012-2016	12961
2007-2011	12961 (Front and Center)
2005-2006	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 SLK350 map light specifications cover model years 2005 through 2016, with two distinct bulb types used across that span.
The 12961 is a Philips part number designating a T10 miniature wedge bulb with a W2.1x9.5d base, rated at 12V and 5W.
The H6W follows the ECE lighting standard used in Europe and worldwide markets, featuring a BAX9s base and a single filament, 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 12961 bulb is specified for the SLK350 across model years 2007-2016, making it the more widely used of the two bulb types in these specifications.
The H6W bulb is specified for the 2005-2006 SLK350, representing the earlier fitment before the transition to the 12961.
For model years 2007-2011, the specifications note that the 12961 bulb applies to both the front and center map light positions, indicating multiple map light locations within the cabin.
The BAX9s base of the H6W is an offset pin base, a design that provides a specific rotational orientation during installation, distinguishing it from the wedge-style seating of the T10.