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Seat Heater Control Unit, Component Description - GF91.30-P-5214FGA

Model 213 

up to model year 2021 

with code 872 (Left and right rear seat heating) 

except code 223 (Electric backrest adjustment and head restraints) 

except code 401 (Climatised front seats) 

except code 873 (Left and right driver's seat heating) 

except code 902 (Seat heater Plus for driver and front passenger) 

except code 903 (Rear comfort seat heating) 

Shown on model 213.0 

Fig 1: Seat Heater Control Unit Components Location - Model 213 Up To Model Year 2021 With Code 872; Except Codes 223, 401, 873, 902 And 903
G13775785Courtesy of MERCEDES-BENZ USA

Location 

The rear seat heater control unit is located at the left in the trunk behind the cover.

Task 

The rear seat heater control unit communicates over the heater LIN

(LIN B28) with the rear SAM control unit (N10/8).

The rear seat heater control unit actuates the following heater pads

directly depending on the request involved:

  Wiring diagram for rear seat heater control unit   PE91.30-P-2101-97DBA