Mercedes-Benz E430 front fog light bulbs use H1 size while rear fog light bulbs use 1156 size. The replacement chart covers vehicle production spanning 1998 to 2002.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mercedes-Benz E430 uses the H1 bulb for the front fog light position across all listed model years, 1998-2002.
The H1 is a single-filament halogen bulb operating at 12V and 55W, built to the ECE standard with a P14.5s base, and holds approval for use in the US and Japan in addition to Europe and worldwide markets.
The P14.5s base on the H1 is a pin-type base with a single contact pin, which is not interchangeable with bayonet-style or multi-pin halogen bases.
The rear fog light position on the E430 uses the 1156 bulb across all listed model years, 1998-2002.
The 1156 is a single-filament bulb built to the ANSI standard, operating at 12V and 21W, and fitted with a BA15s bayonet base common in North American automotive applications.
The BA15s bayonet base of the 1156 uses a single contact at the base, distinguishing it from the BA15d base found on dual-filament bulbs such as the 1157, which is not a compatible substitute.
The wattage difference between the two fog light bulbs is notable: the H1 front fog bulb draws 55W while the 1156 rear fog bulb draws 21W, reflecting the distinct functional roles of forward illumination versus rear visibility signaling.
Both the H1 and 1156 are single-filament designs, meaning each bulb serves only one lighting function and does not combine roles such as running light and brake light within a single unit.