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Home >> Mercedes Benz >> 2018 >> E300 Base >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Electrical System, Equipment & Instruments - 213 Chassis 3 Of 7 >> Testing & Repair >> Remove/Install Active Brake Assist Electric Controller Unit - AR54.21-P-0700LWE

Remove/Install Active Brake Assist Electric Controller Unit - AR54.21-P-0700LWE

Model 213, 238 

with code 258 (COLLISION PREVENTION ASSIST) 

G13746813Courtesy of MERCEDES-BENZ USA

Shown on bumper of model 213 

NOTES Notes on preventing damage to electronic components due to a magnetic tool   AH54.00-P-0002-01A
NOTES Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Commission Active Brake Assist controller unit (A108) When replacing Active Brake Assist controller unit (A108).  
REFER TO SELF-DIAGNOSTIC SYSTEMS   Model 238 with code 258 (COLLISION PREVENTION ASSIST) AD00.00-P-2000-06LWO
REFER TO SELF-DIAGNOSTIC SYSTEMS   Model 213 with code 258 (COLLISION PREVENTION ASSIST) AD00.00-P-2000-04B
2 Remove front bumper   AR88.20-P-2000LWE
3.1 Remove impact absorber (1) from front bumper Model 213, 238 with code 258 (COLLISION PREVENTION ASSIST) except code U60 (Active Bonnet (Pedestrian protection))  
NOTES General information on the impact absorber   AH88.20-P-1000-01A
3.2 Remove pedestrian protection sensors together with impact absorber (1) from front bumper Model 213, 238 with code 258 (COLLISION PREVENTION ASSIST) with code U60 (Active Bonnet (Pedestrian protection)) AR91.60-P-0950LWE
4 Disconnect electrical connection (2)    
5 Unscrew bolt (3) and remove bracket (4)    
6 Remove Active Brake Assist controller unit (A108) from front bumper    
7 Install in the reverse order