Choose the factory headlight system below to see the correct bulb and recommendation path for this 2004 Mercedes-Benz ML350.
Low beam
H7
High beam
H7
Factory setup
Factory setup not specified in fitment source
Choose the factory system installed in this vehicle. Bulb sizes and recommendations change with that selection.
Best headlight upgrades
These products were physically tested by BulbFacts, but the tests were not performed in this exact vehicle unless a card explicitly says otherwise.
Factory setup not specified in fitment source
High Beam: H7 · High/Low Beam Combined: H7
Best direct replacement
OSRAM Night Breaker 200
High Beam H7 · High/Low Beam Combined H7
Estimated price$20-34
BulbFacts testedCorrect bulb size
Best Standard Reflector Upgrade
The Night Breaker 200 is the top standard-wattage reflector recommendation at the time of review. Anything scoring higher in the reflector chart uses much higher wattage, while the NB200 keeps the simple drop-in halogen format.
BulbFacts testedCorrect bulb sizeprojector housing only
Best Premium Distance
The Morimoto XB Elite remains the premium performance benchmark from the current HID recommendations. It tested as one of the strongest 35W projector-focused HID kits and is the better fit when you want a complete, higher-quality conversion kit instead of a generic marketplace option.
A matching bulb size identifies fitment; it does not by itself prove optical compatibility or make a conversion a vehicle-specific recommendation. Use the LED upgrade path only with a reflector housing and confirm beam pattern and glare after installation. Use the HID upgrade path only with a projector housing; it is not a reflector-housing recommendation.
Best headlight upgrades
These products were physically tested by BulbFacts, but the tests were not performed in this exact vehicle unless a card explicitly says otherwise.
Lighting: halogen
Low Beam: H7
Best direct replacement
OSRAM Night Breaker 200
Low Beam H7
Estimated price$20-34
BulbFacts testedCorrect bulb size
Best Standard Reflector Upgrade
The Night Breaker 200 is the top standard-wattage reflector recommendation at the time of review. Anything scoring higher in the reflector chart uses much higher wattage, while the NB200 keeps the simple drop-in halogen format.
BulbFacts testedCorrect bulb sizeprojector housing only
Best Premium Distance
The Morimoto XB Elite remains the premium performance benchmark from the current HID recommendations. It tested as one of the strongest 35W projector-focused HID kits and is the better fit when you want a complete, higher-quality conversion kit instead of a generic marketplace option.
A matching bulb size identifies fitment; it does not by itself prove optical compatibility or make a conversion a vehicle-specific recommendation. Use the LED upgrade path only with a reflector housing and confirm beam pattern and glare after installation. Use the HID upgrade path only with a projector housing; it is not a reflector-housing recommendation.
Best headlight upgrades
These products were physically tested by BulbFacts, but the tests were not performed in this exact vehicle unless a card explicitly says otherwise.
Lighting: HID
Low Beam: D2S
Factory Xenon replacement
OSRAM Night Breaker 220
Low Beam D2S
Estimated price$150
BulbFacts testedCorrect bulb size
Best Premium Output
The Night Breaker 220 is the premium pick when performance matters more than chasing the whitest possible color. It improves low and high beam output while keeping a warmer, weather-friendly stock-style tone.
Measured vs factory Xenon referenceMeasured test
Low beam+58% light
Reference 408 lux · Upgrade 645 lux
Color4,500K 100K cooler
Reference 4,400K · Upgrade 4,500K · 5000K pure white
A matching bulb size identifies fitment; it does not by itself prove optical compatibility or make a conversion a vehicle-specific recommendation.
Other bulbs
Available exterior and interior lighting data for this model year.
Brake Light
1156Possible fitment — verify installed bulb
Cargo / Trunk Light
6418Possible fitment — verify installed bulb
Center High Mount Stop Light
1156Possible fitment — verify installed bulb
Courtesy Light
6418Possible fitment — verify installed bulb
Dome Light
6418Possible fitment — verify installed bulb
Fog Light
H11Possible fitment — verify installed bulb
Front Side Marker
1157Possible fitment — verify installed bulb
Front Turn Signal
1157Possible fitment — verify installed bulb
Glove Box Light
6418Possible fitment — verify installed bulb
License Plate Light
6418Possible fitment — verify installed bulb
Map Light
6418Possible fitment — verify installed bulb
Parking Light
1157Possible fitment — verify installed bulb
Technical details and sources
Fitment, factory-system research, and BulbFacts product tests remain separate evidence. A matching bulb size does not by itself make a conversion a vehicle-specific recommendation.
Position
Bulb or system
Evidence status
High BeamFactory setup not specified in fitment source
H7
Possible fitment — verify installed bulb
High/Low Beam CombinedFactory setup not specified in fitment source
H7
Possible fitment — verify installed bulb
Low BeamLighting: halogen
H7
Likely fitment
Low BeamLighting: HID
D2S
Likely fitment
Other Mercedes-Benz ML350 years
Each model year opens its own BulbFacts record. Bulb sizes and factory systems are not carried over from adjacent years.
Fitment note: Verify the installed bulb, connector, housing, and factory system before ordering. A bulb-size match is not automatically a conversion recommendation or proof of vehicle-specific testing.
