Mercedes-Benz SLK32 AMG Map Light Bulb Size

The Mercedes-Benz SLK32 AMG map light requires bulb size H6W or DE3423 depending on the specific version of the component installed in the vehicle. Data for the bulb sizes covers the range from 2002 to 2004.

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
2004	H6W
2002-2003	DE3423

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Single-filament signalling bulb with BAX9s base. 12V, 6W.	H6W
ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V.	DE3423

Other Locations

Additional Notes

The Mercedes-Benz SLK32 AMG map light specifications reference two distinct bulb types across the 2002-2004 model years: the H6W and the DE3423.
The DE3423 is an ANSI-standard festoon bulb used in North American markets, operating at 12V with a 41mm length and end-cap contacts that make electrical connection at both ends of the bulb body.
The H6W follows the ECE standard, which governs lighting equipment across Europe and much of the world, and it operates as a single-filament signalling bulb at 12V and 6W with a BAX9s base.
The BAX9s base of the H6W is an offset pin base, meaning the two pins are not positioned symmetrically, which prevents incorrect installation and limits fitment to sockets specifically designed for that base type.
The 2004 Mercedes-Benz SLK32 AMG specifies the H6W, while the 2002-2003 model years specify the DE3423, indicating a bulb type change between the 2003 and 2004 model years.
The H6W and DE3423 are not interchangeable. They differ in base type, physical form, and regional standards, with the H6W using a pin base and the DE3423 relying on end-cap contacts within a festoon housing.
The DE3423 festoon format is a common map and dome light bulb in North American vehicle applications, where the bulb is held under spring tension between two contact points inside the fixture.
The H6W wattage rating of 6W places it in the low-output signalling category, a range typical for interior courtesy and map lighting rather than high-intensity exterior applications.