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Home >> Mercedes Benz >> 2020 >> S450 Base >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Electrical System, Equipment & Instruments - 222 Chassis (05 Of 10) >> Testing & Repair >> Remove/Install DC/AC Converter Control Unit - AR54.21-P-1600LF

Remove/Install DC/AC Converter Control Unit - AR54.21-P-1600LF

Model 222 

With Code U67 (230 V socket in rear passenger compartment except code Z22 (Panic alarm system) 

Model 222 

With Code U80 (115 V socket) 

except code Z22 (Panic alarm system) 

G15370506Courtesy 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
DANGER Risk of death  when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC) Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines. AS00.00-Z-0035-01A
Topical note  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
  Notes on HANDS-FREE ACCESS   AH80.61-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Remove right paneling in trunk   AR68.30-P-4600LF
2 Remove rear seat control unit Model 222
with code 223 (Electric backrest adjustment and head restraints)
with code U67 (230 V socket in rear passenger compartment)
except code Z22 (Panic alarm system)
Model 222
with code 223 (Electric backrest adjustment and head restraints)
with code U80 (115 V socket)
except code Z22 (Panic alarm system)
 
      AR91.29-P-1570LFA
3 Remove trailer recognition control unit Model 222.0/1
with code 550 (Trailer coupling) with code U67 (230 V socket in rear passenger compartment) except code Z22 (Panic alarm system) Model 222.0/1
with code 550 (Trailer coupling)
with code U80 (115 V socket)
except code Z22 (Panic alarm system)
 
      AR31.19-P-1300LF
4 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 rear passenger compartment) except code Z22 (Panic alarm system)
Model 222
with code 597 (Heated windshield)
with code U80 (115 V socket)
except code Z22 (Panic alarm system)
 
    Model 222
with code 597 (Heated windshield)
with code U67 (230 V socket in rear passenger compartment)
except code B01 (48V technology)
except code Z22 (Panic alarm system)
Model 222
with code 597 (Heated windshield)
with code U80 (115 V socket)
except code B01 (48V technology)
except code Z22 (Panic alarm system)
AR54.21-P-1603LF 
    Model 222
with code 597 (Heated windshield)
with code B01 (48V technology)
with code U67 (230 V socket in rear passenger compartment)
except code Z22 (Panic alarm system)
Model 222
with code 597 (Heated windshield)
with code B01 (48V technology)
with code U80 (115 V socket)
except code Z22 (Panic alarm system)
AR54.21-P-1603LFM 
5 Open cable ties (1)    
6 Loosen bolts (3) IMPORTANT Do not unscrew bolts (3) completely.  
7 Unscrew nut (4)    
8 Push electrical wiring harness (8) to one side and remove DC/AC converter control unit (N24/3) from strut (2)    
9 Route DC/AC converter control unit (N24/3) downwards into trunk    
10 Unclip plug housing (5) from holder (6)    
11 Disconnect electrical connector (7) and take off DC/AC converter control unit (N24/3)    
12 Remove DC/AC converter control unit (N24/3) from bracket (6) When replacing DC/AC converter control unit (N24/3).  
13 Install in the reverse order