Mercedes-Benz B Electric Drive Turn Signal Bulb Size

The Mercedes-Benz B Electric Drive front turn signal requires a 3457NA bulb size, while the rear turn signal uses either PY21W or 12496 bulb sizes. The replacement chart covers 2014 to 2015 model 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.

Front Turn Signal

YearsBulb Size
2014-20153457NA (With Halogen Capsule Headlamps)

Rear Turn Signal

YearsBulb Size
2015PY21W
201412496

Bulb Specifications

Description Bulb Size
ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V, 27W/7W.3457NA
ECE standard (Europe & worldwide). Single-filament amber bulb with BAU15s bayonet base. 12V, 21W.PY21W
Philips/Osram part number. Halogen bulb, specialty application. 12V.12496

Other Locations

Additional Notes