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2017 Mercedes-Benz GLS450 Bulb Size Chart

Bulb sizes may vary by trim, factory lighting package, region, production date, and previous modifications. Verify the bulb number on your existing bulb before buying.

Last database update: May 2026. Manual review status: Not yet manually reviewed.

Verify before buying: check the bulb number printed on your existing bulb, confirm your trim and factory lighting package, and review the seller's fitment notes.
Disclosure: We may earn a commission from links marked Affiliate. Unmarked retailer links may be plain search links. Always verify bulb fitment before purchasing.

2017 Mercedes-Benz GLS450 Bulb Size Chart

PositionBulb CodeAliasesTrim / PackageFactory TypeConfidenceReviewNotesShop
High BeamH7—Standard listingHalogenHigh
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

AmazoneBay
Low BeamH7—Standard listingHalogenHigh
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

AmazoneBay
Door LightW5W—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon

2017 Mercedes-Benz GLS450 Fitment Notes

Our database shows the same listed bulb sizes for the Mercedes-Benz GLS450 across the 2017 to 2019 range. Still verify your trim, lighting package, and the bulb number in the housing before buying.

Known fitment limitations

  • factory HID or LED packages may use different parts
  • fog lights may depend on equipment package
  • aftermarket headlight assemblies may use different bulbs
  • regional models and production-date splits may differ

See an incorrect bulb size? Submit a correction.

How do the 2017 Mercedes-Benz GLS450's bulbs compare to other years?

The 2018 model continues with the same bulb sizes.

This bulb configuration covers the 2017–2019 model years. 2018 →

Finding the best installation guide...

Other GLS450 Years

20192018

More from Mercedes-Benz

190D190E200200D220220D230230S

Other Vehicles That Use H7 Bulbs

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H7 Comparisons

9005 vs H7H1 vs H7H11 vs H7H4 vs H7

Frequently Asked Questions

Our database lists H7 for the 2017 Mercedes-Benz GLS450 low beam headlights. Verify the bulb number on your existing bulb and confirm your trim or factory lighting package before buying.

Our database lists H7 for the 2017 Mercedes-Benz GLS450 high beam position. Some vehicles vary by trim, lighting package, or previous housing changes.

Dim headlights on a 2017 Mercedes-Benz GLS450 can come from aging halogen bulbs, cloudy lenses, weak electrical connections, or an incorrect bulb. Confirm the listed H7 size against the bulb in the housing before choosing a replacement or upgrade.

The 2017 Mercedes-Benz GLS450 does not have a fog light bulb listed in our current database. If your vehicle has fog lights, verify the bulb in the housing or owner's manual before buying.

The 2017 Mercedes-Benz GLS450 uses a single bulb (dual filament) headlight system. This means one bulb controls both high and low beams.

LED upgrades are available for many H7 applications, but fitment, beam pattern, dashboard warnings, and road-use legality can vary. Use products that list your exact bulb family, such as H7, and verify the factory housing before buying.

Access varies by engine bay layout and headlight housing. Before disassembly, confirm the listed H7 low beam size on the existing bulb or owner's manual, then follow the service procedure for your exact trim.

Rules for LED headlight retrofits vary by location and by housing type. Avoid products that create glare or lack road-use compliance claims, and check local requirements before using an LED conversion on public roads.

Replacement cost depends on bulb technology, brand, and labor access. Common halogen H7 replacements are usually cheaper than LED conversion kits. Check seller fitment notes before comparing prices.

Halogen bulbs and LED replacements differ in output, heat behavior, beam pattern, and electronics. A correct bulb code does not guarantee a correct LED beam pattern, so verify physical fit and seller compatibility notes for the 2017 Mercedes-Benz GLS450.