Q: Transmission leak stuck choppy - 2005 Mercedes Benz C55 AMG

asked by on

I have a small transmission leak, and my car has been really choppy shifting the past few weeks. It get’s stuck in gear, and I’m not able to shift through the number or letter modes. This morning was the worst. It was stuck in first gear, and I drove at 20 mph to the dealership to get it fixed. They said I need a new Transmission Control Unit, so I need to do it myself. So I drove back home at 20 mph. Is this really hard to do? Can you give me some step by step directions on how to install it? I would really appreciate it.

Hello. From the symptoms you describe, it would appear that the vehicle is experiencing issues that have put it into limp, power reduction mode. If the TCU requires replacement, it can usually be found in the engine bay on the passenger side. You also mention that the vehicle has a transmission leak. I would first address the leak, as it may very well be possible that a leak caused the TCU to fail.

This is a commonly known issue that can sometimes affect AMG vehicles. Unless you are familiar with automotive repair, I would advise that you do not attempt these repairs on your own, as a luxury vehicle such as this may be difficult to work on. I would recommend having a professional technician first diagnose the vehicle, and then move forward with the appropriate repairs.

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. Transmission leak stuck choppy - 2005 Mercedes Benz C55 AMG

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: Smoke from the dashboard, parking lights won't turn off

Hello. It sounds like there is a short in the wiring harness of the car. If the wiring comes into contact with other wiring, this may cause a short and smoke from the dashboard. This sometimes happens due to old...

Q: RPM fluctuating when the car is in third gear during acceleration

It sounds like your transmission is either slipping in third gear or having trouble shifting to fourth gear. I would recommend having this issue diagnosed by a certified transmission mechanic, as soon as possible, as this could potentially cause internal...

Q: When driving the car it feels like it's gone into a higher gear.

Hello, thanks for writing in. Is your Check Engine Light illuminated? Your description sounds like your transmission may be in "limp mode" which is usually 2nd gear in many transmissions. It is also possible that the sensation you are getting...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...