Mercedes-Benz E320 Headlight Bulb Size

Additional Notes

• The H7 bulb is the most frequently specified type across the Mercedes-Benz E320 headlight data, appearing in both high beam and low beam positions across 1996-2009 halogen configurations. It is a single-filament halogen bulb rated at 12V and 55W, built to ECE standards, and fitted with a PX26d base.
• The D2R and D2S are both HID xenon discharge bulbs rated at 85V and 35W, but they are not interchangeable. The D2R carries a P32d-3 base and is designed for reflector-type housings, while the D2S uses a P32d-2 base for projector-type housings. The E320 low beam specifications use D2R from 1997-2002 and transition to D2S from 2003-2007, reflecting a housing-type distinction between those periods.
• The D1S differs from the D2-series bulbs in that it incorporates an integral ignitor, eliminating the need for a separate external ignitor unit. It operates at 85V and 35W with a PK32d-2 base and is specified for projector-type housings. The E320 uses D1S for both high and low beam positions in 2008-2009 HID configurations.
• The 9003 bulb, specified for the Mercedes-Benz E320 in 1994-1995, is a dual-filament halogen type built to ANSI standards. Its P43t base and dual-filament design mean it serves both high and low beam functions within a single bulb, rated at 12V with 60W on the high beam filament and 55W on the low beam filament.
• The H1 bulb appears exclusively in the 1996 high beam position under HID headlamp configurations. Like the H7, it is a single-filament halogen bulb rated at 12V and 55W under ECE standards, but it uses a P14.5s base, making it physically incompatible with H7 sockets.
• For 2008-2009 models, the high beam position specifies either D1S or H7 depending on headlamp type, and both designations apply to the same model year. This indicates that HID and halogen headlamp assemblies were offered concurrently, and the correct bulb type is determined by the specific headlamp assembly installed on the vehicle.
• The low beam position on the E320 shows a more varied HID bulb history than the high beam. While the high beam uses only D1S for its HID variant, the low beam progresses through D2R (1996-2002) and D2S (2003-2007) before arriving at D1S (2008-2009), each representing a distinct base type and housing compatibility requirement.
• The 9003 bulb used in 1994-1995 follows ANSI rather than ECE standards, placing it in a different regulatory and physical category from all other bulb types listed in these specifications. Its P43t base is not compatible with the PX26d base of the H7 or the bases of any D-series HID bulbs specified for later model years.