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Home >> Mercedes Benz >> 2019 >> GLS450 >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Electrical System, Equipment & Instruments - 166 Chassis 4 Of 8 >> Testing & Repair >> Remove/Install Collision Prevention Assist Control Unit - AR54.70-P-0002GQC

Remove/Install Collision Prevention Assist Control Unit - AR54.70-P-0002GQC

Model 166 

as of model year 2016 

with code 258 (COLLISION PREVENTION ASSIST) 

Model 292 

with code 258 (COLLISION PREVENTION ASSIST) 

Fig 1: Collision Prevention Assist Control Unit Components Location - Model 166 As Of Model Year 2016 With Code 258
G14132345NOTESREMOVINGINSTALLINGREFER TO SELF-DIAGNOSTIC SYSTEMSREFER 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 Connect diagnostic system and store basic data from COLLISION PREVENTION ASSIST controller unit (A90) When replacing the COLLISION PREVENTION ASSIST controller unit (A90).  
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-04A
2 Switch on ignition and store transmitter key outside of transmission range (min. 2 m)    
3 Use suitable tool to unclip catch hook (3) from cover (2)    
4 Remove cover (2)    
5 Unclip COLLISION PREVENTION ASSIST controller unit (A90) and remove far enough to gain access to electrical connection    
6 Detach electrical connection from COLLISION PREVENTION ASSIST controller unit (A90)    
7 Install in the reverse order    
  Initial startup     
8 Perform SCN coding of COLLISION PREVENTION ASSIST controller unit (A90) using diagnostic system When replacing the COLLISION PREVENTION ASSIST controller unit (A90). AR54.21-P-0015X 
9 Transfer previously stored basic data to the COLLISION PREVENTION ASSIST controller unit (A90) When replacing the COLLISION PREVENTION ASSIST controller unit (A90).  
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-04A