Ezs- ignition switch
CGW- Central Portal
CDI3-engine control unit (CDI for diesel engines)
Electronic traction control system
ESM shift module
SBC- Electronic Induction Brake Control Unit
ESP- electronic stability program
A B- airbag
Driver SAM-Left Front Vehicle Signal Acquisition and Driving Module
Through the side SAM-right front vehicle signal acquisition and driving module.
Rear Sam- Rear Vehicle Signal Acquisition and Execution Module
(Mercedes-Benz uses SAM to control lights, door locks and many other electrical equipment. )
OCP- Overhead operation panel (panel operated by skylight)
UCP- upper operation panel (the panel where the air conditioning operation switch is located)
BCM- battery control module