Bottom control panel control unit design - GF54.21-P-4116-02T

Design 

Fig 1: Identifying Bottom Control Panel Control Unit Components

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Structure 

Fundamentally, the lower control panel control module (N72) consists of the series block and both of the specially equipped blocks with the switches:

• DTR Distance potentiometer (N72r1)
• DTR switch (N72s9)
• Two-way radio switch (N72s11) (code 450)
• PTS OFF switch (N72s13)
• Level positioning switch (N72s18)
• Comfort and sport switch (N72s25)

The built-in switches in the lower control panel control module (N72) have a search lighting and a partial function lighting.