Exhaust valve not working properly and the result of an engine misfire. Mercedez sent us a warranty letter to extend the warranty for this issue 6 months after our warranty expired even though you can find online this has been a known issue for our model of car and year, GL450 2013. There are tons of online forums and threads from Mercedez Benz owners about this manufacturer issue. This should not fall under purchasing an extended warranty or in our case a $17,000 bill to fix the issue on a car with only 70,000 miles on it. This should be a recall.

- Branford, CT, USA

The engine failed under 100k miles after being properly maintained according to the manufactures guidelines.

- Queens Village, NY, USA

2013 Mercedes-Benz GL450; it started with the activation of the vehicle's check - engine light. The Mercedes-Benz service advisor diagnosed the issue as oil intrusion into the vehicle's engine wiring harness. The estimated cost to repair was quoted as $7,0000. This resulted in the replacement of the engine wiring harness, four (4) Lambda sensors, four (4) camshaft hall sensors and four (4) camshaft solenoids. This trouble could cause engine failure or misfire if not corrected. Driving the MB GL450 in this condition is a safety issues for anyone driving on the road. Researching on the internet about MB GL450/550 engine oil intrusion into the engine wiring harness is a common problem.

- Stonecrest, GA, USA

This car has lot of issues with water pump, radiator leak, lot of engine problems. Oil leak it's got less than 100,000 miles. Radiator hoses leak. Car stopped on mass pike going to albany, NY took it to Benz of albany they said engine misfires needs engine replacement and it would cost $47,000 to replace. Very very bad engines. I left a voicemail on Benz customer service and no one called back or send me any type of recalls. Very bad service.

- Seymour, CT, USA

Engine harness wires contamination in me, cause sensors damage and engine problems to start up right normal dealer want to charge me 14K for service and repair, every time I start the car it sounds like it take time to start and I get the check engine evertime I start the car

- Valley Stream, NY, USA

The contact owns a 2012 (na) Mercedes Benz GL450. While driving at 40 mph through a puddle, the vehicle stalled without warning. The contact was able to merge to the side of the road, where the vehicle eventually turned off. The contact stated that the failure recurred intermittently. In addition, the vehicle failed to recognize the key and took several attempts to start the vehicle. The vehicle was taken to the dealer. The technician was unable to duplicate the failure. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 37,000....updated 09/28/15

- New Hope, PA, USA

Car stalled while driving. Problem reported to you, before! they sent me to three dealer, all they did was routine checks and did not admit to problem. This is exactly like GM key problem. Why didn't you survey this issue and get a recall?!!

- Vienna, VA, USA

This is to report an event happened more than once before. The car engine syo suddently while traveling on highway at speed and must have the car pull over to the side of highway to restart again!!!

- Vienna, VA, USA