There are 1 owner-reported lighting complaints for the 2018 Mercedes-Benz GLS-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
MY GLS-450 HAS THE 'LIGHTING PACKAGE' WITH ACTIVE LED HEADLAMPS INCLUDING 'CORNER-ILLUMINATING FRONT HEADLAMPS, ACTIATED (ACTIVATED SPELLED WRONG) BY THE STEERING WHEEL OR TURN-SIGNAL USE, BRIGHTEN YOUR WAY INTO DRIVEWAYS AND GARAGES.' AS I LIVE IN A VERY DARK RURAL AREA, I ORDERED THESE LIGHTS. I SOON DISCOVERED THAT THE LEDS, WHILE SUPERIOR FOR FORWARD LIGHTING,PROVIDE LITTLE OR NO SIDE LIGHTING FOR THE DRIVER TO SEE WHEN TURNING ONTO DIVIDED HIGHWAYS WITH DARK ISLANDS, ETC. THIS IS BECAUSE THE LEDS ARE VERY STRAIGHT SHOOTING FORWARD. BUT THIS LED LIGHTING PACKAGE WAS SUPPOSED TO HAVE "CORNERING LIGHTS" ACTUATED BY TURN SIGNAL OR LOW SPEED WHILE TURNING WHICH SOLVES THIS PROBLEM. I HAD ALREADY EXPERIENCED THE ADVANTAGE OF THESE 'CORNERING LIGHTS' ON MY WIFE'S 2014 MERCEDES-BENZ GLK-250. BUT MY VEHICLE IS MISSING THE 'CORNERING LIGHT' FEATURE. IN CHECKING WITH THE DEALER AND MBUSA, THEY SAY THIS IS BECAUSE NHTSA WILL NOT ALLOW "CORNERING LIGHTS" ON THE GLS-450 BECAUSE OF THE HEIGHT OF THE HEADLIGHT UNIT ABOVE THE GROUND. COULD THIS BE TRUE? LACK OF CORNERING LIGHTS IN THE ACTIVE LED HEADLIGHTS MAKES CORNERING IN THIS VEHICLE UNSAFE AT NIGHT, AND THE LAMP HEIGHT RULE, IF THERE IS ONE, SHOULD BE MODIFIED AND RECALL ISSUED FOR GLS 450 VEHICLES WITH DEFECTIVE ACTIVE LED HEADLIGHTS MISSING THE CORNERING LIGHT FEATURE THEY ADVERTISE AS INCLUDED (SEE MBUSA.COM BUILD YOUR GLS450, LIGHTING PACKAGES). PLEASE TAKE ACTION ON THIS AND LET ME KNOW YOUR DECISION. THANK YOU!
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 25, 2026