Mercedes-Benz E63 AMG S Turn Signal Bulb Size

Mercedes-Benz E63 AMG S front turn signal bulb uses PY21W size for replacement. The chart covers 2018 to 2019 production years with 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

Years	Bulb Size
2018-2019	PY21W

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Single-filament amber bulb with BAU15s bayonet base. 12V, 21W.	PY21W

Other Locations

Additional Notes

The PY21W is the specified front turn signal bulb for the Mercedes-Benz E63 AMG S across the 2018-2019 model years.
The PY21W operates on a 12-volt electrical system and draws 21 watts, placing it in the standard single-filament category for dedicated turn signal applications.
The PY21W carries an ECE designation, meaning it conforms to the Economic Commission for Europe lighting standard, which is recognized across European and many worldwide markets.
The bulb produces amber light natively through its tinted glass envelope rather than through a clear bulb in an amber housing, a distinction relevant to replacement compatibility.
The PY21W uses a BAU15s bayonet base, which features an offset pin arrangement. This offset is intentional and prevents the installation of non-amber variants such as the P21W, which shares a similar base but with a symmetrical pin layout.