Mercedes-Benz E55 AMG Back Up Light Bulb Size

The Mercedes-Benz E55 AMG back up light utilizes 1156 and P21W bulb sizes according to the provided data. Information for the specified lighting component covers the range from 1999 through 2003.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
1999-2003	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156

Other Locations

Additional Notes

The Mercedes-Benz E55 AMG uses the 1156 bulb for the back up light across the 1999-2003 model years.
The 1156 is an ANSI-standardized bulb type, meaning its physical and electrical specifications are governed by a recognized North American standard shared across the US and Canada.
The 1156 operates at 12 volts and 21 watts, which is typical for incandescent reverse light applications in passenger vehicles of this era.
The bulb uses a BA15s bayonet base, a single-contact mount where the "s" denotes a single pin, distinguishing it from the dual-pin BA15d variant with which it is not interchangeable.
As a single-filament bulb, the 1156 serves one lighting function only, unlike dual-filament types such as the 1157, which handle two functions from a single housing.
The BA15s base requires a quarter-turn locking motion for installation, a characteristic of the bayonet mount family as a whole.
Because the 1156 and 1157 share the same BA15s-style housing profile but differ in pin count and filament configuration, substituting one for the other is not electrically compatible and would result in improper fitment or function.