Mercedes-Benz C32 AMG Back Up Light Bulb Size

Mercedes-Benz C32 AMG back up light bulbs use a P21W bulb size for replacement applications. The replacement chart covers 2002 to 2004 vehicle production years with corresponding bulb size specifications.

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
2002-2004	P21W

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W.	P21W

Other Locations

Additional Notes

The Mercedes-Benz C32 AMG uses the P21W bulb for the back up light position across the 2002-2004 model years.
The P21W is an ECE-standardized bulb type, meaning it conforms to European and international regulations for automotive lighting.
P21W bulbs operate on a 12-volt electrical system and draw 21 watts, which is typical for single-filament signalling applications.
The P21W uses a BA15s bayonet base, which is a single-contact bayonet mount. The "s" in BA15s denotes a single contact at the base, distinguishing it from dual-contact variants such as the BA15d.
Because the BA15s base is a single-contact fitting, bulbs with dual-contact bayonet bases are not interchangeable with the P21W in this application, even if the physical size is similar.