Q: Stalling, transmission stuck in first gear

asked by on

While I'm driving, the car starts stalling. The speedometer quits functioning. Also, the transmission seems to get locked in first gear and cannot shift. I've had several repairs done, inlcuding transmission conductor plate replacement, along with the gasket and seals changing. I had the fluid changed and replaced the filter. The car starts having problems when the engine warms up, otherwise it runs fine. What could cause this?

Hi. That can be so frustrating to have your car stall when you expect it to go! It is usually caused by an interruption in the delivery of fuel or spark. Technicians use diagnostic tests depending on the symptoms to gather clues about the cause of stalling. Scan tools are commonly used diagnostic equipment that provide codes from the vehicle’s computer that will frequently indicate the particular part of a system that has issues. You mention that the engine runs better when cold and worse when warm. This can be a clue for a technician to check the engine coolant temperature sensor and fuel trims. An experienced mechanic, such as one from YourMechanic, can come and diagnose why your Mercedes keeps stalling. There may be something in common between the engine driveability issue and transmission issue or they could be unrelated.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Stalling, transmission stuck in first gear

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: Q: Timing belt ripped and after that a weird loud sound

I don't think there was any damage done to your car. Belts break all the time, just put a new one on and it'll be fine. Your steering wheel became hard to turn because your power steering pump wasn't working....

Q: Q: Hesitation when accelerating

Hi There, It sounds like you are describing the symptoms of a failing throttle position sensor. The throttle position sensor monitors the throttle position of the throttle plate inside the throttle body in relation to your foot position on the...

Q: My speedometer needle starts under zero, so when I'm going 40, my speedometer shows 20

Hi, thanks for writing in. The issue you describe indicates that the speedometer needle is now misaligned on the gauge shaft. This can repaired by a knowledgeable speedometer repair facility. The instrument cluster (with the speedometer) must be removed from...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.