Have Transmission Questions? Ask a Mechanic for Answers ASAP
Hi Sam, my name is***** "limp home" do you mean that the transmission stays in 2nd gear and will not shift up?
Ok, can you get it out of limp home mode by turning the key off and on?
Ok, there are a few possibilities for limp home mode on the Mercedes.
The most common is faulty speed sensors in the transmission.
The other possibilities are a faulty gearshift module or a faulty transmission control module.
You need to get the car connected to a Mercedes Star Diagnosis tester to read out the fault codes in the transmission control module. The fault codes will point to the specific problem.
The door lock problem is probably unrelated to the transmission problem. That problem is usually caused by a bad door lock actuator.
Do you have any questions?