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Home >> Mercedes Benz >> 2021 >> A220 4Matic >> Repair and Diagnosis >> Accessories & Equipment >> Collision/Avoidance >> Electrical System, Equipment & Instruments - 177 Chassis (2 Of 4) >> Testing & Repair >> Remove/Install Front SAM Control Unit - AR54.21-P-1254MFA

Remove/Install Front SAM Control Unit - AR54.21-P-1254MFA

Model 118, 177, 243, 247 

Fig 1: Front SAM Control Unit Components Location - Model 177
G15492020Courtesy of MERCEDES-BENZ USA
G15492021Courtesy of MERCEDES-BENZ USA
Topical note  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Commission signal acquisition and actuation module (N10). When replacing signal acquisition and actuation module (N10).  
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-06MFA
2 Switch off ignition and store transmitter key outside of transmitter range (min. 2 m).    
3 Remove right front door sill.   AR68.30-P-4101MFA
4 Fold back the front passenger side floor covering until the holder (4) is accessible.    
5 Remove nuts (2).    
6 Remove holder (4) from stud bolts far enough until electric lines are accessible. NOTES
Do not crush or kink or subject electric lines to tension.
This will result in damage to the electric lines and can impair their function.
 
7 Release and disconnect electrical connectors from signal acquisition and actuation module (N10). IMPORTANT The number of electrical connectors varies according to vehicle equipment.  
8 Release retaining clips of electrical connectors at holder(4). If necessary.  
9 Remove signal acquisition and actuation module (N10) from holder (4).    
10 Install in the reverse order.