C 320 Sedan (203.064) V6-3.2L (112.946) (2001)
Power Seat Motor: Description and Operation
Position Measurement of Seat Adjustment Motors
Function
For the purpose of measuring the position of the seat adjustment the front seat adjustment motor groups with memory, left/right (M27 / M28) both have a
Hall sensor for each transmission servo motor.
The Hall sensor signals are read by the driver-side seat adjustment control module with memory (N32/1), verified for plausibility, and counted by the
location counter for the position measurement.
The received Hall impulses are regarded to be positive or negative depending upon the motor's drive current.