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Remove and install multifunction sensor - AR83.40-P-6730V

MODELS 171.4 with CODE (581b) Convenience automatic air conditioning 

Fig 1: Identifying Multifunction Sensor Components
G05034025Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Removal/installation    
1 Switch off the ignition and remove the transmitter key from the EIS control unit    
2 Open engine hood and raise to vertical position   AR88.40-P-1000V
3 Undo screws (1) in battery cover (2) and remove battery cover (2)    
4 Release latching hook (3) and remove C-AAC [K-KLA] multifunction sensor (B31) from bracket (4) IMPORTANTInstallation:  Ensure proper seating of CAAC [K-KLA] multifunction sensor (B31) in bracket (4).  
5 Disconnect plug and socket connection (5)    
6 Install in the reverse order    
7.1 Read out fault memory When installing a new C-AAC [K-KLA] multifunction sensor (B31).  
REFER TO SELF-DIAGNOSTIC SYSTEMS Connect STAR DIAGNOSIS, read out fault memory   AD00.00-P-2000-04A
    Diagnosis system STAR DIAGNOSIS *WH58.30-Z-1048-13A 
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Number Designation
WH58.30-Z-1048-13A STAR DIAGNOSIS diagnosis system, Compact Passenger Car 6511 1801 00