Mercedes-Benz W210 automatic transmission conductor plate and limp mode
What does the W210 automatic transmission conductor plate do?
The conductor plate is inside the transmission, and the transmission does not have to be removed from the car. Its magnetic sensors read rotational speed, and the control unit determines shifting from them. If the information is wrong, the transmission can stop shifting.
Why does the W210 automatic go into limp mode in one gear?
The cause can be an incorrect signal from the conductor plate sensors: in a neglected transmission, metal particles stick to the sensors, or a short circuit forms between the conductors. Another known cause is a broken O-ring on the control unit connector, through which oil is drawn into the control unit. Read the fault codes and clear them after the repair.
How is the conductor plate of the 722.6 automatic replaced?
1. Drain the transmission fluid and remove the pan. 2. Release the lock of the wiring harness and remove the 7 mm nut of the grommet. 3. Remove the conductor plate and move the sensors to the new one if necessary. 4. Install in reverse order, and do not overtighten the grommet. 5. Replace the filter and the fluid. The plate must not be removed with a hammer. If you are not sure, have a workshop do it.
Can a conductor plate fault be prevented?
Changing the fluid and filter every 60,000 km reduces the build-up of particles on the sensor magnets. The connector should not be tightened too hard.