Replacing an automatic transmission solenoid on a Mercedes W211
Required tools and materials:
* Set of socket wrenches or sockets
* Flat head screwdriver
* New automatic transmission solenoid
* Automatic transmission solenoid gasket
* Transmission fluid
* Funnel or syringe for filling transmission fluid
* Clean rags or towels
Precautions:
* Make sure the car engine is cold and turned off.
* Disconnect the negative terminal of the battery.
* Raise the vehicle on a lift or place it on secure supports.
Replacement procedure:
1. Determine the location of the solenoid: The solenoid is usually located on the side of the automatic transmission housing.
2. Disconnect the solenoid connectors: Using a flat-head screwdriver, carefully disconnect the electrical connectors from the solenoid.
3. Remove the solenoid bolts: Using a socket wrench or socket, remove the bolts securing the solenoid to the transmission housing.
4. Remove the old solenoid: Gently pull the solenoid up and remove it from the transmission housing.
5. Install a new gasket: Apply some transmission fluid to the new solenoid gasket and install it in place of the old one.
6. Install a new solenoid: Insert the new solenoid into the automatic transmission housing and tighten the mounting bolts.
7. Connect the solenoid connectors: Connect the electrical connectors to the solenoid.
8. Install the automatic transmission pan: Install the automatic transmission pan in place and tighten the fastening bolts.
9. Fill transmission fluid: Using a funnel or syringe, pour transmission fluid into the automatic transmission to the recommended level.
10. Check the fluid level: Start the engine and let it idle. Using the automatic transmission dipstick, check the fluid level and add if necessary.
11. Reset automatic transmission adaptations: Using a diagnostic scan tool or after driving for several kilometers, reset automatic transmission adaptations for optimal performance.
12. Connect the negative battery terminal: Connect the negative battery terminal.
Adviсe:
*Use genuine Mercedes parts for best performance and reliability.
* When replacing the solenoid, it is recommended to also replace the solenoid gasket.
*If you are unsure of your skills, consult a qualified mechanic.
* After replacing the solenoid, check the operation of the automatic transmission to ensure there are no leaks or other problems.