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Remove/Install Air Body Control, Control Unit For More Accurate Control Of The Suspension - AR32.22-P-0003LWG

Model 253 with code 489 (AIR BODY CONTROL) 

Shown on model 253.9 

Fig 1: Air Body Control Plus Control Unit (N51/8) Components Location - Model 253 with code 489; shown on model 253.9
G12936149WARNINGREMOVINGINSTALLINGREFER TO SELF-DIAGNOSTIC SYSTEMSCourtesy 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
  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
  Notes on HANDS-FREE ACCESS Model 253
with code 489 (AIR BODY CONTROL)
with code 871 (HANDS-FREE ACCESS)
with code 889 (KEYLESS-GO)
AH80.61-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Perform initial startup of AIR BODY CONTROL Plus control unit (N51/8) When replacing AIR BODY CONTROL Plus control unit (N51/8).  
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-04B
2 Remove left side load compartment lining Model 253 (except 253.992/993)
with code 489 (AIR BODY CONTROL)
AR68.30-P-1180LWG
    Model 253.992/993
with code 489 (AIR BODY CONTROL)
AR68.30-P-1180RFW
3 Remove nuts (1) and remove AIR BODY CONTROL Plus control unit (N51/8) from bracket    
4 Disconnect electrical connections (2) and remove AIR BODY CONTROL Plus control unit (N51/8)    
5 Install in the reverse order