Armrest Heater Control Unit, Component Description - GF68.20-P-2001A

Model 223 

with code 906 (Front armrest heater) 

Model 223 

with code 907 (Rear armrest heater) 

Courtesy of MERCEDES-BENZ USA

The numbers on the pins indicate the pin numbering of the slots.

Fig 1: Armrest Heater Control Unit Components Location - Model 223 With Code 906, 907

Courtesy of MERCEDES-BENZ USA

Location