Mercedes-Benz Sprinter front fog light bulbs use H11 size while rear fog light bulbs use P21W size. The replacement chart covers vehicle production spanning 2010 to 2025.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mercedes-Benz Sprinter uses the H11 bulb for the front fog light position across the 2010-2025 model years.
The H11 is a single-filament halogen bulb operating at 12V and 55W, fitted with a PGJ19-2 base, and rated under the ECE standard, which governs lighting equipment across Europe and many other markets worldwide.
The H11 also carries approval for use in the United States, making it one of the few ECE-rated halogen types accepted under both regulatory frameworks.
The PGJ19-2 base is a keyed connector, meaning only bulbs with that specific base configuration are physically compatible with the front fog light socket on the Sprinter.
The rear fog light position on the Sprinter uses the P21W bulb across the same 2010-2025 model year span.
The P21W is a single-filament signalling bulb rated at 12V and 21W, considerably lower in wattage than the H11 used at the front, which reflects its role as a signalling lamp rather than an illumination source.
The P21W uses a BA15s bayonet base, a single-contact bayonet fitting that is not interchangeable with the PGJ19-2 base found on the H11.
Because the front and rear fog light positions use entirely different base types, PGJ19-2 and BA15s respectively, bulbs from one position cannot be substituted into the other without a socket adapter.
Both the H11 and P21W are classified under ECE standards, indicating that replacement bulbs carrying ECE approval markings are the appropriate specification for this vehicle.
The consistent use of H11 at the front and P21W at the rear across all sixteen model years in the specifications indicates no socket or base type change occurred within this production period for either fog light position.