Tire Pressure Monitor Control Unit, Component Description - GF40.15-P-5124A

Model 223 

with code 475 (Tire pressure monitor (TPM)) 

Courtesy of MERCEDES-BENZ USA

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

Fig 1: Tire Pressure Monitor Control Unit Components Location - Model 223 With Code 475

Courtesy of MERCEDES-BENZ USA

Location