The Mercedes-Benz 200D uses P21W bulbs for both front and rear turn signal applications, with the size remaining consistent across the model line. The replacement chart covers vehicle production spanning 1966 to 1973 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 P21W is the sole bulb type specified for both the front and rear turn signals of the Mercedes-Benz 200D across all listed model years.
The P21W is a single-filament bulb, meaning it serves one lighting function rather than combining two, such as stop and tail, into a shared unit.
The P21W operates at 12 volts and draws 21 watts, which places it in the standard wattage range typical of dedicated turn signal and reverse light applications.
The P21W uses a BA15s bayonet base, a single-contact fitting where the "s" denotes a single central contact pin at the base, as opposed to the dual-contact BA15d variant.
The P21W follows ECE (Economic Commission for Europe) standards, indicating it was designed for European and international markets rather than SAE-regulated North American applications.
The front turn signal of the Mercedes-Benz 200D uses the P21W for model years 1968-1973.
The rear turn signal uses the P21W across a longer span, covering model years 1966-1973.
Because both the front and rear positions share the same P21W specification, the physical bulb unit is interchangeable between those positions on this vehicle.
The BA15s base is not interchangeable with a BA15d base, as the number of contact pins differs between the two, making base type a critical factor in fitment.
A P21W bulb with an amber-tinted glass envelope is a distinct variant from a clear P21W; the specifications listed here do not indicate glass color, so that distinction falls outside the scope of these fitment entries.