Mercedes-Benz S350 Headlight Bulb Size

Additional Notes

• The H9 bulb, used in the Mercedes-Benz S350 high beam position for 2012-2013, is a single-filament halogen type rated at 12V and 65W. It follows the ECE standard and uses a PGJ19-5 base, with approval also granted in the United States.
• The H7 bulb appears across both high beam and low beam positions in the S350 for the 1995 and 2006 model years. It is a single-filament halogen bulb rated at 12V and 55W, using a PX26d base under the ECE standard, with additional approval in the US and Japan.
• The 1994 S350 uses the 9003 bulb in both the high beam and low beam positions. Unlike the ECE-standard halogen types, the 9003 follows the ANSI standard applicable in the US and Canada. It is a dual-filament bulb with a P43t base, rated at 12V with 60W on the high beam filament and 55W on the low beam filament.
• The D1S bulb serves as the low beam light source for the 2012-2013 S350. It is an HID (xenon) discharge bulb operating at 85V and 35W, using a PK32d-2 base. A defining characteristic of the D1S is its integral ignitor, which is built directly into the bulb itself, and it is designed for projector-type housings.
• The 2006 S350 low beam position lists two separate bulb sizes: H7 as the standard fitment and D2S for vehicles equipped with HID headlamps. These two types are not interchangeable, as they serve different headlamp system configurations.
• The D2S, used in the 2006 S350 with HID headlamps, shares the same 85V and 35W electrical rating as the D1S but uses a P32d-2 base and requires an external ignitor rather than an integrated one. Substituting a D1S for a D2S, or vice versa, is not supported by the specifications due to the differing base types and ignitor configurations.
• The H1 bulb is listed solely for the 1995 S350 high beam position. It is a single-filament halogen bulb rated at 12V and 55W with a P14.5s base, following the ECE standard with approval also in the US and Japan.
• The base types across the listed bulbs are all distinct from one another, meaning no two bulb types in these specifications share a physically compatible socket. The PGJ19-5 (H9), PX26d (H7), P14.5s (H1), P43t (9003), PK32d-2 (D1S), and P32d-2 (D2S) bases each correspond to a specific bulb family with no cross-fitment between them.