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Home >> Mercedes Benz >> 2014 >> S550 Base >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Electrical System, Equipment & Instruments - 222 Chassis >> Testing & Repair >> Remove and install DC/AC converter control unit - AR54.21-P-1600LF

Remove and install DC/AC converter control unit - AR54.21-P-1600LF

MODEL 222 

with CODE U67 (230 V socket in the rear) 

without CODE Z22 (Panic alarm system) 

MODEL 222 

with CODE U80 (115 V socket) 

without CODE Z22 (Panic alarm system) 

Fig 1: DC/AC Converter Control Unit Remove/Install Components
G11132728DANGERDANGERNOTESIMPORTANTREMOVINGINSTALLINGIMPORTANTCourtesy of MERCEDES-BENZ USA
DANGER 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
DANGER Risk of death  from touching live components with AC voltages over 30 V Do not touch live parts. Persons who have electronic implants (e.g. cardiac pacemakers) must not  perform any work on components conducting AC voltage greater than 30 V. AS54.00-Z-0001-05A
NOTES Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
IMPORTANT Notes on sensor system for trunk lid opening/closing   AH80.61-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Trim in right of luggage compartment   AR68.30-P-4600LF
3 Remove rear seat control unit MODEL 222.0/1
with CODE 223 (Electrically adjustable rear bench seat)
with CODE U67 (230 V socket in the rear)
without CODE Z22 (Panic alarm system)
MODEL 222.0/1
with CODE 223 (Electrically adjustable rear bench seat)
with CODE U80 (115 V socket)
without CODE Z22 (Panic alarm system)
AR91.29-P-1570LFA
4 Remove trailer recognition control unit MODEL 222.0/1
with CODE 550 (Trailer coupling)
with CODE U67 (230 V socket in the rear)
without CODE Z22 (Panic alarm system)
MODEL 222.0/1
with CODE 550 (Trailer coupling)
with CODE U80 (115 V socket)
without CODE Z22 (Panic alarm system)
AR31.19-P-1300LF
5 Remove windshield heater control unit and place to one side with the bracket mounted and electrical lines connected MODEL 222
with CODE 597 (Heated windshield)
with CODE U67 (230 V socket in the rear)
without CODE Z22 (Panic alarm system)
MODEL 222
with CODE 597 (Heated windshield)
with CODE U80 (115 V socket)
without CODE Z22 (Panic alarm system)
AR54.21-P-1603LF 
6 Open cable ties (1)    
7 Loosen screws/bolts (3) IMPORTANT Do not unscrew bolts (3) completely.  
8 Unscrew nut (4)    
9 Push electrical wiring harness (8) to one side and remove DC/AC converter control unit (N24/3) from strut (2)    
10 Route DC/AC converter control unit (N24/3) downwards into trunk    
11 Unclip connector housing (5) from bracket (6)    
12 Disconnect electrical connection (7) and remove DC/AC converter control unit (N24/3)    
13 Remove DC/AC converter control unit (N24/3) from bracket (6) When replacing DC/AC converter control unit (N24/3).  
14 Install in the reverse order