Hella 354878031 Headlight Assembly - Left

HELLA Left Headlight Assembly for GLK-Class

This HELLA headlight assembly is a genuine OE-style replacement for the left side of select Mercedes-Benz GLK models. Part number 354878031 is built as a standard replacement halogen unit with SAE approval and street-legal status for road use.

Key Features

• Genuine OE from HELLA front lighting line
• Left headlight assembly with 4 light functions
• Halogen design with H7 bulb type and W5W lamp type
• Bulbs included; no control unit included
• SAE approved and street legal
• 12V electrical system
• Position light function included
• For vehicles without dynamic bending light

Product Details

HELLA Front Lighting focuses on exterior lighting built for visibility and safety in daily driving and night operation. This headlight assembly, part number 354878031, is a left-side replacement for Mercedes-Benz GLK250, GLK300, and GLK350 applications. It uses halogen bulb technology and includes the bulbs needed for the assembly, while mounting hardware is not included. The unit is marked for Mercedes-Benz and is listed as a standard replacement for vehicles without dynamic bending light.

Compatible With 2012-2015 Mercedes-Benz GLK300, left; 2012-2015 Mercedes-Benz GLK350, left; and 2013-2015 Mercedes-Benz GLK250, left. This part cross-references Mercedes-Benz 204 820 72 59 for the same application.

Common Replacement Reasons

• Cracked or cloudy left headlight lens
• Dim or failed low-beam output
• Broken position light function
• Moisture intrusion in the headlamp housing
• Failed inspection due to lighting performance

Installation Notes

Assy/disassy by qualified personnel required. Verify the vehicle is equipped without dynamic bending light before ordering. Confirm left-side placement, 12V electrical requirements, and bulb specifications before installation. Because this assembly includes bulbs and does not include a control unit, transfer or verify any vehicle-side components as needed during replacement.

Quality Assurance

HELLA is a recognized OE lighting supplier, and this assembly is SAE approved with SAE test marking for road use. The part number 354878031 is engineered as a direct replacement lighting assembly for the listed Mercedes-Benz GLK applications.