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Home >> Mercedes Benz >> 2021 >> CLS450 4Matic >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Electrical System, Equipment & Instruments - 257 Chassis 3 Of 8 >> Testing & Repair >> Remove And Install DC/AC Converter Control Unit - AR54.21-P-1600FR

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

Model 257 

with code U67 (230 V socket in rear passenger compartment) 

Model 257 

with code U80 (115 V socket) 

Fig 1: DC/AC Converter Control Unit Component Location - Model 257 Except Code 865
G14543441Courtesy of MERCEDES-BENZ USA

Shown on model 257 except code 865 (TV tuner) 

Fig 2: DC/AC Converter Control Unit Component Location - Model 257 With Code 865
G14543442Courtesy of MERCEDES-BENZ USA

Shown on model 257 with code 865 (TV tuner) 

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 luggage compartment lining on right   AR68.30-P-4800FR
2 Detach ground line of on-board electrical system battery   AR54.10-P-0003FR 
3 Unscrew nuts (1) and place holder (2) with attached electrical lines to one side    
4 Detach electrical connections (3, 4)    
5 Unscrew nut (5) Model 257
with code 865 (digital TV)
with code U67 (230 V socket in rear passenger compartment)
Model 257
with code 865 (digital TV)
with code U80 (115 V socket)
 
6 Detach DC/AC converter control unit (N24/3) from bracket (2)    
7 Install in the reverse order