The Mercedes-Benz SLK280 front fog light uses H7 and 9006 bulb sizes, while the rear fog light requires a P21W bulb size. The replacement chart covers 2006 to 2008 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mercedes-Benz SLK280 front fog light uses two different bulb types across its model years: the H7 for 2006 and 2008, and the 9006 for 2007.
The H7 and 9006 are not interchangeable despite sharing identical electrical ratings of 12V and 55W. The H7 uses a PX26d base while the 9006 uses a P22d base, making the two physically incompatible.
The H7 is governed by the ECE standard, which applies across Europe and worldwide markets, and holds additional approval in the US and Japan. It is a single-filament halogen bulb.
The 9006 follows the ANSI standard, the regulatory framework used in the US and Canada. It is also a single-filament halogen bulb, matching the H7 in wattage and voltage but differing in base design.
The rear fog light specification for the Mercedes-Benz SLK280 is consistent across 2006-2008, with all three years calling for the P21W bulb.
The P21W operates at 12V and 21W, a significantly lower wattage than the front fog light bulbs, which reflects its role as a signalling bulb rather than an illumination source.
The P21W uses a BA15s bayonet base, a single-contact bayonet fitting that is distinct from the pin-type bases found on the H7 and 9006.
The P21W is an ECE-standard bulb, placing it within the same regulatory framework as the H7 used in the front fog positions for 2006 and 2008.