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Remove/Install Control Unit For Windshield Heater - AR54.21-P-0122XG

Model 463 

as of Model year 2019 

with code F49 (Heated windscreen) 

Fig 1: Windshield Heater Control Unit Components Location - Model 463 As Of Model Year 2019 With Code F49
G13658845REMOVINGINSTALLINGREFER 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 windshield heater control unit (N61). When replacing windshield heater control unit (N61).  
REFER TO SELF DIAGNOSTIC SYSTEMS     AD00.00-P-2000-04B
2 Disconnect ground line of battery.   AR54.10-P-0003XG 
3 Remove front floor covering (1) on front passenger side.   AR68.80-P-0008XG
4 Remove rear duct (2) with attached right B-pillar air distribution actuator motor (M16/34) and place to one side.   AR83.10-P-2039XG
5 Unclip expansion rivets (3). SPECIAL TOOL Dismantling tool Fig 2
6 Remove nuts (4).    
7 Remove holder (5).    
8 Disconnect electrical connector (6).    
9 Open flap (7).    
10 Disconnect ground line (8) from windshield heater control unit (N61).    
11 Disconnect positive line (9) from windshield heater control unit (N61).    
12 Unscrew nuts (10).    
13 Remove windshield heater control unit (N61).    
14 Install in reverse order.    
Fig 2: Identifying Dismantling Tool (000 589 95 63 00)
G13658846Courtesy of MERCEDES-BENZ USA