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Home >> Mercedes Benz >> 2017 >> C300 Base, 2D Convertible >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Electrical System - Body - 205 Chassis - 3 Of 5 >> Testing & Repair >> Remove/Install Control Unit For Emergency Call System >> Remove/Install Control Unit For Emergency Call System - AR82.95-P-1005LWH

Remove/Install Control Unit For Emergency Call System - AR82.95-P-1005LWH

Model 205.047/147/247 

up to model year 2019 

with code 348 (Emergency call/assistant system) 

Shown on model 205.247 except code 550 (Trailer hitch) 

Fig 1: Control Unit For Emergency Call System Components Location - Model 205.047 Up To Model Year 2019 With Code 348
G13023939WARNINGREMOVINGINSTALLINGREFER TO SELF-DIAGNOSTIC SYSTEMSIMPORTANTIMPORTANTCourtesy of MERCEDES-BENZ USA
WARNING Risk of injury  caused by fingers being jammed or pinched when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof. No parts of the body or limbs should be within the operating area when the components are moving. AS00.00-Z-0011-01A
  Risk of death  when working on component parts and systems with U > = 30 V alternating voltage (AC) or U > = 60 V direct voltage (DC) Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines. AS00.00-Z-0035-01A
  General information on handling vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system   AH00.00-Z-0300-01A
  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
  Notes on HANDS-FREE ACCESS   AH80.61-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Commission emergency call system control unit (N123/4). When replacing emergency call system control unit (N123/4).  
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-04B
2 Switch off ignition and store transmitter key outside of transmission range (min. 2 m).    
3.1 Remove load compartment floor rear section. Model 205.047/147
up to model year 2019
with code 348 (Emergency call/assistant system)
 
3.2 Fold over load compartment floor rear section (1). Model 205.247
up to model year 2019
with code 348 (Emergency call/assistant system)
 
4 Remove trim (2).    
5 Remove rear fuse and relay module (3) from holder (4) and place to one side with attached electric lines. Model 205.047/147/247
up to model year 2019
with code 348 (Emergency call/assistant system)
AR54.15-P-0001LW
6 Remove trailer recognition control unit from holder (4) and place to one side with attached electric lines. Model 205.047/147/247
up to model year 2019
with code 348 (Emergency call/assistant system)
with code 550 (Trailer coupling)
 
7 Remove holder (4) and place to one side, as shown. IMPORTANT The rear SAM control unit does not have to be detached from the bracket (4).  
8 Release electrical connections (5) and disconnect. IMPORTANT The number can vary according to the equipment.  
9 Remove emergency call system control unit (N123/4) from holder (6).    
10 Install in the reverse order.