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Home >> Mercedes Benz >> 2020 >> SL550 >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Electrical System - Body - 231 Chassis >> Testing & Repair >> Remove/install control unit for TELE AID emergency call system - AR82.95-P-0005RK

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

MODEL 231 with CODE 348 (Emergency call/assistant system) 

Fig 1: TELE AID Emergency Call System Control Unit Remove/Install Components
G11129357NOTESREMOVINGINSTALLINGIMPORTANTREFER TO SELF-DIAGNOSTIC SYSTEMSCourtesy of MERCEDES-BENZ USA
NOTES Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Remove rear wall paneling   AR68.30-P-4750RK
2 Switch off ignition and remove transmitter key (A8/1) or KEYLESS-GO start/stop button (S2/3) from electronic ignition lock control unit (N73) IMPORTANT KEYLESS-GO start/stop button (S2/3) only with CODE 889 (KEYLESS-GO).  
3 Unscrew nuts (1) at emergency call system control unit (N123/4)    
4 Remove emergency call system control unit (N123/4) from major assembly carrier    
5 Disconnect electrical connectors (2) and remove emergency call system control unit (N123/4)    
6 Install in the reverse order    
7 Perform initial startup of emergency call system control unit (N123/4) using STAR DIAGNOSIS Only when replacing emergency call system control unit (N123/4).  
REFER TO SELF-DIAGNOSTIC SYSTEMS Connect STAR DIAGNOSIS and read out fault memory   AD00.00-P-2000-04A