MERCEDES-BENZ GL450 · model year

2007 MERCEDES-BENZ GL450

162 NHTSA complaints, 8 crash reports for this specific cohort.

NHTSA overall rating

Not crash-tested

New Car Assessment Program

The 2007MERCEDES-BENZGL450 carries 162 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 8 crashes, 46 fires, 21 injuries, and 0 fatalities. No NCAP 5-star crash-test rating is available for this model year in the federal database.

Component-level analysis is where model-year complaints become actionable: the top complaint category for the 2007 GL450 is seats with 33 filings, followed by electrical system (26) and power train (15). Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability.

NHTSA currently has 15 investigation files overlapping the 2007 GL450. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page — a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.

162
Complaints
8
Crashes
46
Fires
21
Injuries
0
Deaths

Total Complaints

162 filings

Crashes Reported

8 reports

Source

NHTSA ODI

Federal complaints database

Complaints vs. fleet median (215)

At or below the fleet median complaint volume.

Complaints by Component

ComponentCount
SEATS33
ELECTRICAL SYSTEM26
POWER TRAIN15
STEERING8
SUSPENSION8
SERVICE BRAKES, HYDRAULIC7
VEHICLE SPEED CONTROL7
SEATS:FRONT ASSEMBLY:SEAT HEATER/COOLER7
ENGINE5
ENGINE AND ENGINE COOLING4
FUEL/PROPULSION SYSTEM4
AIR BAGS3
SUSPENSION:FRONT3
STRUCTURE:BODY3
UNKNOWN OR OTHER3

Recent Complaints

20250203SEATS:FRONT ASSEMBLY:SEAT HEATER/COOLER

The contact owns a 2007 Mercedes-Benz GL450. The contact stated that while her husband was driving at an undisclosed speed, he felt a sharp pinch coming from the driver’s side seat. Upon further inspection, the contact’s husband noticed an abnormal hole with smoke coming from the driver’s side seat. There was no visible fire present. No medical attention was sought. No warning light was illuminated. The local dealer was contacted; however, the vehicle was not diagnosed or repaired due to the cost. The manufacturer was not made aware of the failure. The failure mileage was approximately 190,000.

Mileage: 190,000

20241107STRUCTURE

The contact owns a 2007 Mercedes-Benz GL450. The contact stated that the SRS warning light was illuminated. Additionally, the contact stated that while the dealer was servicing the air suspension strut failures, the dealer informed the contact that the vehicle had sustained severe water damage. The dealer informed the contact that the water had leaked from the sunroof through the headliner and onto the floor. The dealer informed the contact the water leak had caused mold on the headliner, and mold and corrosion on the floor, where the battery and electrical wires were located. The dealer informed the contact that the water entry had caused electrical failures, causing the driver's side and passenger's side third-row windows and the horn to become inoperable. The vehicle was not repaired. The contact related the failure to an unknown recall. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was unknown.

20241107ELECTRICAL SYSTEM

The contact owns a 2007 Mercedes-Benz GL450. The contact stated that the SRS warning light was illuminated. Additionally, the contact stated that while the dealer was servicing the air suspension strut failures, the dealer informed the contact that the vehicle had sustained severe water damage. The dealer informed the contact that the water had leaked from the sunroof through the headliner and onto the floor. The dealer informed the contact the water leak had caused mold on the headliner, and mold and corrosion on the floor, where the battery and electrical wires were located. The dealer informed the contact that the water entry had caused electrical failures, causing the driver's side and passenger's side third-row windows and the horn to become inoperable. The vehicle was not repaired. The contact related the failure to an unknown recall. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was unknown.

20241022ELECTRICAL SYSTEM

Blinkers and horn stopped working windshield wipers coming on without being turned on it’s saying drive to workshop without shifting gears and won’t start in the middle of the highway

20241022UNKNOWN OR OTHER

Blinkers and horn stopped working windshield wipers coming on without being turned on it’s saying drive to workshop without shifting gears and won’t start in the middle of the highway

20230908CrashSERVICE BRAKES, HYDRAULIC

The contact owned a 2007 Mercedes-Benz GL450. The contact received a recall notification of the NHTSA Campaign Number: 22V315000 (Service Brake, Hydraulic). The vehicle was taken to the dealer where the contact was informed by the dealer that the vehicle had been inspected but the brake booster was not replaced. The contact then stated that approximately eight months later, while his wife was driving at an undisclosed speed, she depressed the brake pedal to stop the vehicle however, the vehicle failed to stop. As a result, the vehicle crashed into another vehicle. No warning lights were illuminated. No injuries were sustained. No medical attention was required. A police report was filed. The vehicle was towed to a tow lot and deemed a total loss by the insurance company. The dealer was not notified of the failure. The manufacturer was notified of the failure and the contact was provided a case number. The contact was informed that he would be in contact however, had not received a call

Mileage: 187,000

20230621SEATS

The contact owns a 2007 Mercedes-Benz GL450. The contact stated that while driving approximately 50 MPH in the rain, there was an abnormal smoke odor inside the cabin of the vehicle. The contact stated that the vehicle then started filling up with smoke. The contact checked and became aware that the back of the front driver's seat was on fire. The contact was able to pull over and extinguish the fire with his hand. The contact sustained a little burn to his hand, but medical attention was not sought. The Fire Department was not contacted. Neither a Police nor Fire report was not filed. The vehicle was towed to the local dealer where it was diagnosed that the seat needed to be replaced. The vehicle was not repaired. The manufacturer was contacted but no assistance was provided. The approximate failure mileage was 59,050.

Mileage: 59,050

20221212AIR BAGS

The steering wheel airbag spontaneously deployed with no prior warning sensors activated or collision (moments after pulling into driveway at home). Mercedes Benz refuses to take any responsibility, or at least inspect and replace the steering wheel and airbag. Driver's arm was partially injured due to deployment, not severe. However the concern remains of whether this could have deployed while driving, causing critical injuries. Should we worry about the remaining airbags spontaneously deploying?

20221017POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)

The contact owns a 2007 Mercedes-Benz GL450. The contact stated that while driving at an undisclosed speed, the transmission slipped and failed to shift into the intended gear. The vehicle was towed to the dealer where it was diagnosed with transmission failure. The dealer replaced the transmission control module. The manufacturer was made aware of the failure. The failure mileage was approximately 130,000. The contact stated that their vehicle still has not been repaired. The dealer nor the manufacturer have a remedy to fix the vehicle or accommodate him.

Mileage: 130,000

20220606SERVICE BRAKES

Was driving my vehicle on the freeway and pulled off on and exit ramp. Brake pedal went to floor with very little braking had to pump the brake pedal to regain control. Brakes felt soft. Returned home by pumping brakes. No warning lights, Next day bled brakes and replaced brake fluid. Function restored but no cause could be identified for the air in the brake lines. Very disturbing and unsafe. Sounds very much like 22V315000.

20220530SERVICE BRAKES

In the past several weeks, whenever I press on the brake pedal firmly at a stoplight or even on the highway, the "low brake light" alarm on the vehicle turns on. I went and checked the brake fluid level, but it is normal. It also seems to take longer to brake the car than before. I'm not sure if it is related to the recent recall or not.

20211120ENGINE

The GL450 has the balance shaft problem .It skipped timing and caused major engine failure.. This problem is prevalent for the M273 engine. The parts wear prematurely. The timing is affected and the 4 cam power train misaligns. The engine quits and the repair is usually over 4000.00. It produces 1208 1200 codes along with misfire codes. I feel Mercedes Benz Corp is responsible and has liability for the loss. Thank You. [XXX] INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

Mileage: 153,000

20211120UNKNOWN OR OTHER

The GL450 has the balance shaft problem .It skipped timing and caused major engine failure.. This problem is prevalent for the M273 engine. The parts wear prematurely. The timing is affected and the 4 cam power train misaligns. The engine quits and the repair is usually over 4000.00. It produces 1208 1200 codes along with misfire codes. I feel Mercedes Benz Corp is responsible and has liability for the loss. Thank You. [XXX] INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

Mileage: 153,000

20201118SEATS

ON NOVEMBER 17, 2020, I TURNED MY DRIVER SEAT HEATER AND SUDDENLY SMELLED SOMETHING BURNING. AFTER SEVERAL MINUTES DRIVING I DECIDED TO TURN OF THE HEATER, THE BURNING SENSATION ON MY BACK WAS INTENSE. ONCE I PARKED, I NOTICED A HOLE IN MY SEAT THE SIZE OF A QUARTER! I CHECKED MY CLOTHING AND NOTICED IT MELTED THE ELASTIC PART AT THE BOTTOM MY JACKET.

Mileage: 96,382

20201113POWER TRAIN

I WAS DRIVING ON THE HIGHWAY AT 70 MPH AND THE CAR WILL DOWNSHIFT AND I COULD ONLY GO 40 MPH NO MATTER HOW HARD I STEPPED ON THE GAS. I HAD TO PULL OVER, TURN THE CAR OFF, WAIT TEN MINUTES AND THEN START IT UP AGAIN. AGAIN THIS WEEK IT ALSO HAPPENED.

Mileage: 135,000

20200803ELECTRICAL SYSTEM

RAIN LEAKED IN THROUGH THE BACK CAUSING THE REAR SAM TO BE FILLED WITH WATER. THIS CAUSED ALL OF MY TAILLIGHTS TO GO OUT. I SAW A RECALL FOR VEHICLES WITH THE SAME YEAR AS MINE BUT THERE IS NO RECALL FOR THE GL 450 THAT I CAN FIND. I CALLED MERCEDES WHICH YIELDED NOTHING.THEY TOLD ME THE RECALLS ARE VIN SPECIFIC, NOT VEHICLE SPECIFIC. I GUESS MY VIN WASN'T CHOSED EVEN THOUGH IT HAS THE SAME ISSUE AS THE ONES THEY RECALLED IN 2009. THIS IS A NEW SAM. IT WAS REPLACED BY US WHEN WE BOUGHT THE VEHICLE USED.

20200803EXTERIOR LIGHTING

RAIN LEAKED IN THROUGH THE BACK CAUSING THE REAR SAM TO BE FILLED WITH WATER. THIS CAUSED ALL OF MY TAILLIGHTS TO GO OUT. I SAW A RECALL FOR VEHICLES WITH THE SAME YEAR AS MINE BUT THERE IS NO RECALL FOR THE GL 450 THAT I CAN FIND. I CALLED MERCEDES WHICH YIELDED NOTHING.THEY TOLD ME THE RECALLS ARE VIN SPECIFIC, NOT VEHICLE SPECIFIC. I GUESS MY VIN WASN'T CHOSED EVEN THOUGH IT HAS THE SAME ISSUE AS THE ONES THEY RECALLED IN 2009. THIS IS A NEW SAM. IT WAS REPLACED BY US WHEN WE BOUGHT THE VEHICLE USED.

20200521POWER TRAIN

MY CAR BATTERY DIED, ROADSIDE ASSISTANCE JUMPED MY CAR, MECHANIC REPLACED MY BATTERIES. THE CAR STARTED WITHOUT PROBLEMS, BUT THEN A MESSAGE CAME UP IN MY DASHBOARD IN RED SAYING TO DRIVE THE CAR TO THE WORKSHOP WITHOUT SHIFTING GEARS; AFTER THE MECHANIC CHECKED THE CAR AND DID SOME RESEARCH HE FOUND THAT THE INTELLIGENT SERVO MODULE WAS BAD; THE CARD WOULD NOT SHIFT INTO GEAR. THE VEHICLE WAS STATIONARY WITH THE ENGINE RUNNING IN THE SHOP. *TR

Mileage: 142,000

20191115FireSEATS:FRONT ASSEMBLY:SEAT HEATER/COOLER

TL* THE CONTACT OWNS A 2007 MERCEDES-BENZ GL450. THE CONTACT STATED THAT THE DRIVER'S SEAT HEATER BURNED THROUGH THE SEAT AND HER COAT. AN ABNORMAL BURNING ODOR WAS DETECTED AND FLAMES APPEARED. THE CONTACT EXTINGUISHED THE FIRE. THERE WERE NO INJURIES. THE VEHICLE WAS TAKEN TO EURO MOTORCARS BETHESDA (7020 ARLINGTON RD, BETHESDA, MD 20814, (301) 986-8800) WHERE IT WAS DIAGNOSED THAT THE SEAT NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT CONTACTED. THE FAILURE MILEAGE WAS 83,000.

Mileage: 83,000

20190819ELECTRICAL SYSTEM

TL* THE CONTACT OWNS A 2007 MERCEDES-BENZ GL450. WHILE DRIVING VARIOUS SPEEDS, THE ABS INDICATOR ILLUMINATED AND REMAINED LIT. IN ADDITION, THE ESP AND CHECK ENGINE INDICATORS ALSO ILLUMINATED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO DIAGNOSED THAT ALL THE WHEELS NEEDED TO BE REPLACED AND REFERRED THE CONTACT TO THE DEALER .THE CONTACT CALLED MERCEDES-BENZ OF SOUTH ORLANDO AT 407-374-0033 (LOCATED AT 4301 MILLENIA BLVD, ORLANDO, FL 32839) AND WAS INFORMED THAT THE PARTS WERE ON BACKORDER. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 190,000.

Mileage: 190,000

Compare 2007MERCEDES-BENZGL450 to Similar Vehicles

NHTSA Investigations

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Frequently Asked Questions

How many complaints does the 2007 MERCEDES-BENZ GL450 have?
The 2007 MERCEDES-BENZ GL450 has 162 NHTSA complaints, 8 crashes, 46 fires, 21 injuries, and 0 deaths reported.
What are the most common problems with the 2007 MERCEDES-BENZ GL450?
The most-complained component for the 2007 MERCEDES-BENZ GL450 is SEATS with 33 complaints. Other frequently reported areas include ELECTRICAL SYSTEM and POWER TRAIN.
Is the 2007 MERCEDES-BENZ GL450 safe to buy?
Review the complaint history, crash and fire reports, safety ratings, and recall status on this page to make an informed decision. No NHTSA crash test rating is available for this model year. Compare with other model years using the links above.
Where does this data come from?
All complaint, recall, and safety rating data is sourced from the National Highway Traffic Safety Administration (NHTSA). Complaints are filed by vehicle owners through NHTSA's Office of Defects Investigation.

Vehicle Safety Guides

Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.