Hella 354878151 Headlight Assembly - Left

HELLA Left Bi-Xenon Headlight for Mercedes-Benz GLK

Restore front-end lighting performance with this HELLA Genuine OE from HELLA headlight assembly, part number 354878151. Built for the left side and engineered for Mercedes-Benz GLK250, GLK300, and GLK350 applications, it delivers HID bi-xenon lighting with integrated indicator function and SAE-approved street-legal compliance.

Key Features

• Genuine OE from HELLA front lighting line
• Part number 354878151 for left-side replacement
• Bi-xenon headlight assembly with HID D1S gas discharge tube
• Bulbs included; control unit not included
• Street legal and SAE approved
• Designed for vehicles with dynamic bending light
• Five light functions with indicator
• 12V standard replacement grade

Product Details

HELLA front lighting is built around the role headlights play in nighttime driving and work conditions: clear forward illumination and dependable road visibility. This assembly uses D1S HID technology with a bi-xenon light design, amber and white bulb colors, and a left fitting position for direct replacement on select Mercedes-Benz GLK models. The part number 354878151 is also referenced by cross-number applications including 204 820 27 39 and A 204 820 27 39.

Compatible With 2012-2015 Mercedes-Benz GLK300, left; 2012-2015 Mercedes-Benz GLK350, left; and 2013-2015 Mercedes-Benz GLK250, left. This HELLA 354878151 headlight assembly is a direct-fit lighting solution for Mercedes-Benz GLK front-end repair and restoration work.

Common Problems This Part Can Address

• Dim, failed, or inconsistent left headlight output
• Cracked or weather-damaged headlight housing
• Loss of HID bi-xenon lighting performance
• Indicator function failure in the left front lamp assembly
• Replacement needs after collision or front-end body repair

Installation Notes

Assembly and disassembly by qualified personnel are required. This headlight is supplied without a control unit, and mounting hardware is not included. Verify D1S bulb and dynamic bending light equipment before installation, and confirm left-side fitment against the vehicle’s original lamp configuration. For best results, inspect connectors, aiming, and sealing surfaces during replacement.

Quality Assurance

As a HELLA Genuine OE front lighting component, this assembly is built to OE-style specifications for the listed Mercedes-Benz GLK applications. It is SAE approved and marked for street-legal use.