NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
115 reports62,000 miles · Jan 20, 2013
Power Train
THE VEHICLE GETS STUCK IN A GEAR LOW OR HIGH AND WILL NOT GET OUT OF THAT GEAR UNTIL THE CAR IS TURNED OFF AND THEN BACK ON. THIS IS A VERY DANGEROUS SITUATION FOR A FAMILY THAT IS EITHER MERGING ON TO THE HIGHWAY OR TRYING TO ACCELERATE. THIS IS A PROBLEM FOR THESE VEHICLES AND MAKES IT VERY DANGEROUS TO DRIVE. YOU DO NOT KNOW …
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THE VEHICLE GETS STUCK IN A GEAR LOW OR HIGH AND WILL NOT GET OUT OF THAT GEAR UNTIL THE CAR IS TURNED OFF AND THEN BACK ON. THIS IS A VERY DANGEROUS SITUATION FOR A FAMILY THAT IS EITHER MERGING ON TO THE HIGHWAY OR TRYING TO ACCELERATE. THIS IS A PROBLEM FOR THESE VEHICLES AND MAKES IT VERY DANGEROUS TO DRIVE. YOU DO NOT KNOW IF IT IS STUCK IN A GEAR UNTIL YOU TRY TO ACCELERATE, IT EITHER WILL BE IN 1ST GEAR OR A HIGH GEAR 5-6? AND WILL ACCELERATE VERY SLOWLY. *TR
NHTSA ODI #10493526
69,300 miles · Jan 11, 2013
SeatsFire
DRIVERS SIDE SEAT HEATER BURNED THROUGH SEAT CAUSING SMOKE AND HOLE. *TR
NHTSA ODI #10492291
103,000 miles · Jan 2, 2013
EnginePower TrainSteering
TL* THE CONTACT OWNS A 2007 MERCEDES BENZ GL450. THE CONTACT STATED THAT THE VEHICLE FAILED TO START HOWEVER, ALL OF THE WARNING LIGHTS ON THE INSTRUMENT PANEL WERE ILLUMINATED FOLLOWED BY A WARNING CHIME. THE CONTACT ALSO STATED THAT THERE WAS A LEAK FROM THE BOTTOM OF THE VEHICLE. THE VEHICLE WAS TOWED TO THE DEALER FOR DIAGNO…
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TL* THE CONTACT OWNS A 2007 MERCEDES BENZ GL450. THE CONTACT STATED THAT THE VEHICLE FAILED TO START HOWEVER, ALL OF THE WARNING LIGHTS ON THE INSTRUMENT PANEL WERE ILLUMINATED FOLLOWED BY A WARNING CHIME. THE CONTACT ALSO STATED THAT THERE WAS A LEAK FROM THE BOTTOM OF THE VEHICLE. THE VEHICLE WAS TOWED TO THE DEALER FOR DIAGNOSTIC TESTING WHERE THE TECHNICIAN RECOMMENDED A FLUID FLUSH AND REPLACING THE POWER STEERING SEAL, STEERING COLUMN MODULE, WIRING HARNESS, AUXILIARY BATTERY AND TRANSMISSION. IN ADDITION, THE CONTACT WAS ADVISED THAT AN OIL CHANGE WAS NEEDED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE AND CURRENT MILEAGE WAS 103,000. KMJ
NHTSA ODI #10490739
80,000 miles · Dec 20, 2012
SeatsFireInjury
TL* THE CONTACT OWNS A 2007 MERCEDES GL450. THE CONTACT STATED THAT WHILE ATTEMPTING TO ENTER THE FREEWAY, THE VEHICLE EMITTED A STRONG BURNING ODOR FROM THE DRIVER'S SEAT. THE CONTACT THEN FELT HER SKIN BURNING. THE CONTACT COASTED ONTO THE SHOULDER AND DISCOVERED THAT HER CLOTHING WAS BURNED AND THE DRIVER'S SEAT WAS EMITTING …
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TL* THE CONTACT OWNS A 2007 MERCEDES GL450. THE CONTACT STATED THAT WHILE ATTEMPTING TO ENTER THE FREEWAY, THE VEHICLE EMITTED A STRONG BURNING ODOR FROM THE DRIVER'S SEAT. THE CONTACT THEN FELT HER SKIN BURNING. THE CONTACT COASTED ONTO THE SHOULDER AND DISCOVERED THAT HER CLOTHING WAS BURNED AND THE DRIVER'S SEAT WAS EMITTING SMOKE. THE VEHICLE WAS TAKEN TO THE DEALER. THE DEALER DID NOT INSPECT THE VEHICLE AND THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE AND CURRENT MILEAGE WAS 80,000.
NHTSA ODI #10489393
105,000 miles · Dec 10, 2012
Suspension
TL* THE CONTACT OWNS A 2007 MERCEDES BENZ GL 450. THE CONTACT STATED THAT WHILE DRIVING 30 MPH, THE FRONT END OF THE VEHICLE SUDDENLY COLLAPSED. UPON INSPECTION, THE CONTACT NOTICED THERE WAS NO SPACE BETWEEN THE TIRE AND THE WHEEL WELL. THE VEHICLE WAS TOWED TO A DEALER WHERE IT WAS FOUND THAT THE COMPRESSOR FOR THE FRONT AIR S…
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TL* THE CONTACT OWNS A 2007 MERCEDES BENZ GL 450. THE CONTACT STATED THAT WHILE DRIVING 30 MPH, THE FRONT END OF THE VEHICLE SUDDENLY COLLAPSED. UPON INSPECTION, THE CONTACT NOTICED THERE WAS NO SPACE BETWEEN THE TIRE AND THE WHEEL WELL. THE VEHICLE WAS TOWED TO A DEALER WHERE IT WAS FOUND THAT THE COMPRESSOR FOR THE FRONT AIR SUSPENSION HAD FAILED. THE CONTACT ALSO STATED THAT THE AIR COMPRESSOR WAS REPLACED PREVIOUSLY BUT THE FAILURE RECURRED. THE VEHICLE WAS REPAIRED. THE FAILURE MILEAGE WAS 105,000. THE VIN WAS NOT AVAILABLE.
NHTSA ODI #10487852
47,700 miles · Oct 1, 2012
Suspension
TL* THE CONTACT OWNS A 2007 MERCEDES BENZ GL450. THE CONTACT STATED THE VEHICLE MADE A WHISTLING AND RUMBLING SOUND IN THE FRONT OF THE VEHICLE. THE CONTACT CONFIRMED THAT THERE WAS NO STEERING OR BRAKE PROBLEMS. THE CONTACT HAD NOT TAKEN THE VEHICLE TO THE DEALER FOR DIAGNOSTIC TESTING. THE FAILURE MILEAGE WAS 47,700.
NHTSA ODI #10478078
92,000 miles · Sep 25, 2012
Electrical System
HORN STARTS HONKING BY ITSELF. WILL SOUND FOR 30 SECONDS OR MORE AND THEN STOP. OTHERWISE THE HORN DOES NOT WORK.. HORN CONTINUES TO RANDOMLY SOUND WHILE DRIVING. VERY UNSAFE AS IT STARTLES OTHER DRIVERS. TOOK TO DEALER WHO DIAGNOSED THE PROBLEM AS A BROKEN HORN SENSOR. HOWEVER TO FIX, THEY SAID THEY NEEDED TO REPLACE THE STEERI…
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HORN STARTS HONKING BY ITSELF. WILL SOUND FOR 30 SECONDS OR MORE AND THEN STOP. OTHERWISE THE HORN DOES NOT WORK.. HORN CONTINUES TO RANDOMLY SOUND WHILE DRIVING. VERY UNSAFE AS IT STARTLES OTHER DRIVERS. TOOK TO DEALER WHO DIAGNOSED THE PROBLEM AS A BROKEN HORN SENSOR. HOWEVER TO FIX, THEY SAID THEY NEEDED TO REPLACE THE STEERING WHEEL. TOTAL PRICE IS $1300 WITH LABOR. AT THIS PRICE IT WILL BE A WHILE BEFORE IT CAN BE FIXED. THIS APPEARS TO BE A COMMON PROBLEM WITH THIS MODEL. A GOOGLE SEARCH TURNED UP SEVERAL SIMILAR COMPLAINTS ON VARIOUS FORMS. AT THE $1,300 COST, THERE MUST BE SEVERAL MERCEDES GL 450 'S DRIVING AROUND WITH FAULTY HORNS. *TR
NHTSA ODI #10477010
72,715 miles · Aug 18, 2012
Vehicle Speed Control
SPEED CONTROL BECAME NULL DURING ACCELERATION AT 72 MPH. DURING THE TIME OF ACCELERATION, TRANSMISSION MADE AN ODD SOUND THEN SPEEDOMETER MOVED FROM 72 MPH TO 35 MPH IN JUST SECONDS AND CAR WOULD NOT GO OVER 35 MPH REGARDLESS OF HOW MUCH PRESSURE WAS APPLIED TO THE ACCELERATOR. *TR
NHTSA ODI #10471372
44,396 miles · Feb 15, 2012
Electrical SystemSeatsFire
DRIVER SIDE SEAT CAUGHT FIRE AFTER HEATED SEAT BUTTON DEPRESSED ON THE DASH. APPROXIMATELY THREE MINUTES HAD ELAPSED WHEN SEAT BEGAN TO SMOKE. THE SMOKE CONTINUED AS THE SEAT CAUGHT FIRE ON THE FRONT LEFT PANEL OF THE BACK PORTION OF THE SEAT. THE FIRE PROJECTED THROUGH THE SEAT, BURNING A HOLE THROUGH THE SEAT ABOUT TWO INCHES …
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DRIVER SIDE SEAT CAUGHT FIRE AFTER HEATED SEAT BUTTON DEPRESSED ON THE DASH. APPROXIMATELY THREE MINUTES HAD ELAPSED WHEN SEAT BEGAN TO SMOKE. THE SMOKE CONTINUED AS THE SEAT CAUGHT FIRE ON THE FRONT LEFT PANEL OF THE BACK PORTION OF THE SEAT. THE FIRE PROJECTED THROUGH THE SEAT, BURNING A HOLE THROUGH THE SEAT ABOUT TWO INCHES IN DIAMETER. DRIVER'S SWEATER WAS SINGED BY THE FLAME. *TR
NHTSA ODI #10448071
105,000 miles · Dec 11, 2011
Engine And Engine Cooling
CHECK ENGINE LIGHT-- CAUSED BY TIMING CHAIN AND SPROCKET WEAR-- COMMON ISSUE WITH MANY MERZ OF THIS TYPE OF ENGINE. *TR
NHTSA ODI #10439305
Official recalls
2Apr 26, 2024
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2006-2012 ML, GL, and R-Class vehicles. Please refer to MBUSA's recall report for specific vehicle model details. Moisture may accumulate and cause corrosion in the brake booster housing unit, which can result in reduced brake performance or brake failure.
Consequence & remedy
Consequence: Reduced brake performance or brake failure can increase the risk of a crash.
Remedy: Owners are advised not to drive their vehicles until the remedy has been performed. Dealers will remove the rubber sleeve, inspect the brake booster, and as necessary, replace the brake booster. All repairs will be performed free of charge. Owner notification letters were mailed on May 24, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MMUSA's number for this recall is 2024050001/2. This recall is an expansion of previous recall number 22V-315.
May 9, 2022
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2006-2012 ML-Class, GL-Class, and R-Class vehicles. Please refer to MBUSA's recall report for specific vehicle model details. Moisture may accumulate and cause corrosion in the brake booster housing unit, which can result in reduced brake performance or brake failure.
Consequence & remedy
Consequence: Reduced brake performance or brake failure can increase the risk of a crash.
Remedy: Owners are advised not to drive their vehicles until the remedy has been performed. Dealers will remove the rubber sleeve, inspect the brake booster, and as necessary, replace the brake booster. All repairs will be performed free of charge. Owner notification letters were mailed June 30, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's numbers for this recall are 2022050014, 2022050015 2022090006, & 2022090007.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗