The Mercedes-Benz Sprinter outer tail light uses a P21W bulb size, while the tail light accommodates P21W and P21/5W bulb sizes. The replacement chart covers vehicle production years from 2010 to 2025 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 Sprinter outer tail light uses two distinct bulb types across its model years: the P21W and the P21/5W, both governed by ECE standards recognized across Europe and worldwide markets.
The P21W is a single-filament signalling bulb rated at 12V and 21W, fitted with a BA15s bayonet base. Its single filament means it serves one lighting function at a time.
The P21/5W is a dual-filament signalling bulb rated at 12V with two wattage outputs, 21W and 5W, fitted with a BAY15d bayonet base. The two filaments allow it to serve separate lighting functions, such as a brighter stop light and a dimmer running light, within a single bulb.
The BA15s base of the P21W and the BAY15d base of the P21/5W are not interchangeable. The BAY15d base has offset pins that prevent incorrect installation, while the BA15s base has aligned pins. Substituting one for the other is not physically compatible.
The outer tail light on the Mercedes-Benz Sprinter used the P21W bulb for model years 2010-2016.
For model years 2017-2018, the outer tail light specification shifts to the P21/5W without any noted conditional fitment.
For model years 2019-2021, the P21/5W fitment is conditional, applying specifically to vehicles equipped with halogen headlamps.
For model years 2022-2025, the outer tail light returns to the P21W specification without conditional notes.
The P21/5W also appears as the outer tail light bulb for model years 2010-2016, indicating that both the P21W and P21/5W were specified for the outer tail light position during that same period, reflecting distinct fitment positions or configurations within the assembly.