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Home >> Mercedes Benz >> 2019 >> C300 4Matic, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 347 (Electrical System, Equipment & Instruments - 253 Chassis 5 Of 9) >> Testing & Repair >> Remove/Install Touchpad Control Unit >> Remove/Install Touchpad Control Unit - AR54.21-P-0503LWA

Remove/Install Touchpad Control Unit - AR54.21-P-0503LWA

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Model 205, 213, 238, 253 

with code 446 (Touchpad only) 

except code 448 (Touchpad) 

Model 293 

with code 446 (Touchpad only) 

MODIFICATION NOTES

10.04.2019 Disassembly tool added. Step 5  
Fig 1: Touchpad Control Unit Components Location - Model 253 With Code 446
G14201312REMOVINGINSTALLINGREFER TO SELF-DIAGNOSTIC SYSTEMSREFER TO SELF-DIAGNOSTIC SYSTEMSREFER TO SELF-DIAGNOSTIC SYSTEMSSPECIAL TOOLCourtesy of MERCEDES-BENZ USA
Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Perform commissioning of touchpad (A105). When replacing touchpad (A105).  
REFER TO SELF-DIAGNOSTIC SYSTEMS   Model 293
with code 446 (Touchpad only)
AD00.00-P-2000-06FR
REFER TO SELF-DIAGNOSTIC SYSTEMS   Model 205, 213, 253
with code 446 (Touchpad only)
except code 448 (Touchpad)
AD00.00-P-2000-04B
REFER TO SELF-DIAGNOSTIC SYSTEMS   Model 238
with code 446 (Touchpad only)
except code 448 (Touchpad)
AD00.00-P-2000-06LWO
2 Remove cover (1) from center console. Model 205, 213, 253 with transmission 725
with code 446 (Touchpad only)
except code 448 (Touchpad)
Model 293
with code 446 (Touchpad only)
AR68.20-P-2350LW
    Model 238 with transmission 725
with code 446 (Touchpad only)
except code 448 (Touchpad)
AR68.20-P-2350LWO
    Model 253.992/993
with code 446 (Touchpad only)
except code 448 (Touchpad)
AR68.20-P-2350RFW
3 Remove bolts (2) from touchpad (A105).    
4 Remove touchpad (A105) from cover (1).    
5 Unclip and remove left lower control panel (N72/4) and right lower control panel (N72/5) at catch hooks (arrows). When replacing touchpad (A105).
SPECIAL TOOL Dismantling tool
Fig 2
6 Install in the reverse order.    
Fig 2: Identifying Dismantling Tool (000 589 95 63 00)
G12619044Courtesy of MERCEDES-BENZ USA