Buyer summary: Identify the chassis before comparing price or styling. The GLA W156 product targets 2015-2019 vehicles, the GLB X247 product targets 2020+, and the GLC X253 product targets 2016+. These lamps are model-specific and should not be treated as interchangeable.
Mercedes compact SUV headlight comparison
| Vehicle | Chassis | Product range | Main fitment check |
|---|---|---|---|
| GLA | W156 | 2015-2019 | Halogen-to-LED path, facelift and connectors |
| GLB | X247 | 2020+ | Original LED system, facelift and sequential functions |
| GLC | X253 | 2016+ | Pre-facelift/facelift and halogen/xenon/LED configuration |
GLA W156 option
The GLA W156 LED headlight is the appropriate path for the 2015-2019 compact crossover. Its details reference a halogen upgrade. Read the GLA compatibility guide.
GLB X247 option
The GLB X247 LED headlights target 2020+ vehicles and emphasize sequential DRL styling. Confirm factory modules and supported adaptive functions.
GLC X253 option
The GLC X253 LED headlight targets 2016+ vehicles. Verify facelift status and original halogen, xenon or LED equipment. The GLB and GLC checks are detailed in the combined compatibility guide.
How to choose correctly
- Match the VIN and chassis code first.
- Record original lamp part numbers, connectors and modules.
- Confirm supported DRL, indicator, adaptive, leveling and dashboard-monitoring functions.
- Select the correct regional beam pattern.
- Compare total installed cost including adapters, coding, aiming and diagnostics.
Frequently asked questions
Are GLA GLB and GLC headlights interchangeable?
No. W156, X247 and X253 are different platforms with different lamp shapes, mounts, body geometry and electronics. Use only the verified model-specific assembly.
Which year models are covered?
The GLA product covers 2015-2019, the GLB product 2020+, and the GLC product 2016+. VIN, build date and facelift confirmation remain necessary.
Does every option require coding?
Not every vehicle will need the same work, but coding, parameterization, adapters, resistors or module transfer may be required when the original lighting system differs.
What components should be included?
Confirm left and right assemblies plus the required LED drivers, ballasts, control modules, adapters, harnesses and mounting brackets for the exact chassis.
Which option is easiest to install?
The correct same-model assembly with matching original equipment is the easiest path. Cross-model or major halogen-to-LED changes add wiring, module and coding complexity.
