Remove/install control unit for TELE AID emergency call system - AR82.95-P-0005W

MODEL 172.4 with CODE (494) USA version 

Fig 1: Identifying TELE AID Emergency Call System Control Unit Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Switch off ignition and remove transmitter key from EZS control unit	On vehicles with code (889) Keyless-Go: Press Keyless-Go start/stop button repeatedly until ignition is switched off. Remove transmitter key from vehicle and store it in a location beyond its transmission range (at least 2 m).
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
2	Remove paneling in luggage compartment	Only paneling at center.	AR68.30-P-4600W
3	Remove control units carrier plate (1)	Only fold over.
4	Remove satellite radio control unit		AR82.60-P-7545W
5	Separate electrical connectors (2)
6	Unscrew nuts (3) from emergency call system control unit (N123/4)
7	Remove emergency call system control unit (N123/4)
8	Install in the reverse order