Skip the auto shop - Our mechanics make house calls

Q: Car will not shift into reverse or park.

asked by on

When I stopped car, it will only shift to neutral. I am unable to shift into reverse or park?

My car has 102377 miles.
My car has an automatic transmission.

Hi, thanks for writing in. Try turning the car off then shifting it to park. If that works, most likely the causes are the brake light switch or the transmission control module. From previous experience working in a Mercedes service department, those are the two most likely causes. The brake light switch can have an internal short. It is the first link in the chain, so to speak. The brake light switch not only signals the brake lights, it also tells the ABS computer you have your foot on the brake pedal and also tells the transmission control module the same thing. The transmission control module may also have and internal short. Also, there has been cases where transmission fluid migrated within the wiring harness up into the transmission control module, causing similar issues. I suggest the car be checked by a technician to verify which is the issue as replacing parts in a Mercedes can get quite costly. It’s best to have a technician verify things first. Here at YourMechanic, we can have a technician come to your home or office to inspect and diagnose this issue for you, and make or suggest the necessary repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Gears grinding at low RPMs.

I am going to go ahead and move forward with the assumption that your Honda Civic is equipped with a manual transmission. I have owned Honda’s most my life and I have encountered this problem with the sound of transmission...

Q: My 95 Ranger shakes when accelerating from a complete stop.

Hey there. The different responses based on whether you are attempting to move forward or backward, suggests it might be a broken transmission or motor - allowing both to move around when the engine generates power for forward motion. Reverse...

Q: 2003 Mercedes C240 will not start

At 210 thousand miles, it really could be just about anything. If the alternator wasn't charging and you drove the car until the battery voltage went so low that it cut off, there are probably a zillion codes stored in...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...