Steps to remove an automatic transmission (AT) on a Mercedes 124:
Tools and materials:
* Wrench set
* Phillips screwdriver
* Flat head screwdriver
* Automatic transmission oil dispenser
* New oil pan gasket
* New automatic transmission filters
* Container for collecting oil from automatic transmission
Security measures:
* Make sure the car is parked on a level surface and the handbrake is on.
* Disconnect the negative terminal of the battery.
* Drain the oil from the automatic transmission.
Procedure:
1. Disconnect transmission cooling:
* Loosen and disconnect the transmission coolant hoses from the radiator.
* Secure hoses to prevent fluid leakage.
2. Disconnect the electrical connectors:
* Locate the electrical connectors leading to the automatic transmission.
* Carefully disconnect the connectors by pressing the latches.
3. Remove the automatic transmission pan:
* Place a container to collect oil under the automatic transmission oil pan.
* Loosen and unscrew the automatic transmission pan bolts.
* Remove the automatic transmission pan, allowing the oil to drain into a container.
4. Disconnect the driveshaft:
* Mark the position of the driveshaft on the differential flange.
* Loosen the bolts holding the driveshaft to the differential flange.
*Using a crowbar or other suitable tool, carefully remove the driveshaft.
5. Disconnect the transmission support:
* Locate the transmission mount that supports the automatic transmission.
* Loosen and unscrew the bolts securing the transmission mount to the body and automatic transmission.
* Remove the transmission support.
6. Disconnect the throttle cable (if equipped):
* Locate the throttle cable that runs from the gas pedal to the throttle body.
* Disconnect the cable from the throttle control lever on the automatic transmission.
7. Disconnect the gear selector:
* Locate the gear selector from the gear lever to the automatic transmission.
* Disconnect the gear selector by pressing the retaining spring.
8. Disconnect the drives:
* Loosen and remove the bolts holding the drive shafts to the differential flanges.
* Using a pry bar or other suitable tool, carefully remove the drive shafts.
9. Unscrew the automatic transmission mounting bolts:
* Locate the bolts holding the automatic transmission to the engine and differential flange.
* Loosen and unscrew these bolts.
10. Lift and remove the automatic transmission:
* Use a transmission support or jack to lift the automatic transmission.
* Carefully remove the automatic transmission from the engine and differential flange.
11. Installation of a new automatic transmission:
* Clean the surfaces that will connect the new automatic transmission to the engine and differential flange.
* Apply a new gasket to the oil pan.
* Install a new automatic transmission and tighten the mounting bolts.
* Reconnect all previously disconnected components in reverse order.
* Pour new fluid into the automatic transmission and check its level.
* Make sure all electrical connectors are connected.
* Connect the negative terminal of the battery.
Note:
* It is recommended to replace the automatic transmission filters when removing the automatic transmission.
* The automatic transmission removal process may vary depending on the specific model and year of manufacture of the Mercedes 124.
*If you do not have experience working with transmissions, it is recommended that you seek assistance from a qualified mechanic.