The Mercedes-Benz ML350 brake light utilizes a P21W bulb size for illumination across all listed vehicle configurations. Provided data covers a continuous span from 2003 through 2015 for the specified automotive component.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mercedes-Benz ML350 uses the P21W bulb across all listed brake light positions, spanning model years 2003-2015.
The P21W is an ECE-standard single-filament bulb rated at 12 volts and 21 watts, designed primarily for signalling applications such as brake lights.
P21W bulbs use a BA15s bayonet base, which is a single-contact bayonet fitting with a 15mm collar.
The BA15s base designation indicates a single offset pin, which physically prevents incorrect installation of double-contact variants such as the BA15d.
The ML350 brake light specification applies to model years 2003-2015 without variation, meaning no alternative bulb size is listed across that entire production span.
The Center High Mount Stop Light on the ML350 also specifies the P21W for model years 2003-2007, making it directly interchangeable with the standard brake light bulb for those years.
ECE standardization of the P21W means the bulb specification conforms to European regulations, which govern light output and base tolerances for road use across many global markets.
Because both the brake light and the Center High Mount Stop Light share the P21W specification, a single bulb type serves multiple stop-light positions on the ML350 models where both are listed.