Mercedes-Benz E63 AMG Turn Signal Bulb Size

The Mercedes-Benz E63 AMG front turn signal bulb utilizes 3357NA, 3457NA, and 2357NA sizes depending on specific production configurations. The replacement chart covers 2007 through 2013 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

Years	Bulb Size
2013	3357NA
2008-2012	3457NA (With Halogen Capsule Headlamps)
2007	2357NA

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament wedge bulb (T25), natural amber glass. 12V, 27W.	3357NA
ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V, 27W/7W.	3457NA
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. 12V, 26.9W/8W.	2357NA

Other Locations

Additional Notes

The Mercedes-Benz E63 AMG front turn signal draws from three distinct bulb types across its model years: the 3357NA, 3457NA, and 2357NA, each carrying different filament configurations and base types despite sharing the same natural amber glass construction.
The 3457NA is the most frequently specified bulb in these front turn signal listings, covering the 2008-2012 model years under the halogen capsule headlamp condition.
The 3457NA is a dual-filament T25 wedge bulb rated at 12V with a 27W primary filament and a 7W secondary filament, conforming to ANSI standards for the US and Canadian markets.
The 3357NA, specified for the 2013 model year, is a single-filament T25 wedge bulb rated at 12V and 27W. Unlike the 3457NA, it carries no secondary filament, making the two bulbs functionally non-interchangeable despite sharing the same T25 wedge base form.
The 2357NA, specified for the 2007 model year, uses a BAY15d bayonet base rather than a wedge base, which physically distinguishes it from both the 3357NA and 3457NA and prevents cross-substitution between these types.
The BAY15d base on the 2357NA is a dual-contact bayonet fitting, consistent with its dual-filament design rated at 12V, 26.9W and 8W respectively.
The 3457NA fitment for the 2008-2012 model years is conditional, applying specifically to vehicles equipped with halogen capsule headlamps. This condition indicates that headlamp type is a determining factor in front turn signal bulb selection for those years.
All three bulb types in these specifications carry the "NA" suffix, denoting natural amber glass. This coloring is built into the glass envelope itself rather than applied as a coating, producing the amber output required for turn signal function without reliance on a colored lens.
The 3357NA and 3457NA share the same T25 wedge base and identical primary wattage of 27W, but the absence of a secondary filament in the 3357NA means the two types serve different circuit configurations and are not rated as interchangeable.
All bulb types listed conform to ANSI standards applicable to the US and Canadian markets, reflecting a regional specification framework that governs voltage, wattage, and base type classifications.