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Home >> Mercedes Benz >> 2020 >> SLC43 AMG Base >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Electrical System - Body - 172 Chassis - 3 Of 5 >> Testing & Repair >> Remove/Install Headlamp Unit >> Remove/Install Headlamp Unit - AR82.10-P-4733W

Remove/Install Headlamp Unit - AR82.10-P-4733W

Model 172.4 

with code 640 (High-performance LED) 

Model 172.4 

with code 641 (Dynamic LED headlamps, left-hand traffic) 

Model 172.4 

with code 642 (Dynamic LED headlamps, right-hand traffic) 

Fig 1: Headlamp Unit Components Location - Model 172.4 With Codes 640, 641 642
G13848221Courtesy of MERCEDES-BENZ USA
REMOVING Remove     
1 Remove front fender   AR88.20-P-2000W
2 Remove cover (1)    
3 Remove bolts (2)    
4 Detach left front Headlamp unit or right front Headlamp unit, until electrical connector is accessible    
5 Release and disconnect electrical connector of left front Headlamp unit or right front Headlamp unit    
6 Remove left front Headlamp unit or right front Headlamp unit    
INSTALLING Install     
7 Connect electrical connector of left front Headlamp unit or right front Headlamp unit    
8 Insert left front Headlamp unit or right front Headlamp unit and tighten screws (2) slightly by hand Check gaps. In case of a complaint

Adjust gap dimensions.
AR60.00-P-0700-01V
    Gap dimension *BE60.00-P-1001-01Y 
    SPECIAL TOOL Feeler gauge Fig 2
9 Tighten bolts (2)    
10 Install cover (1)    
11 Install front bumper   AR88.20-P-2000W
TEST AND ADJUSTMENT VALUES FOR GAP DIMENSIONS

Number Designation Model 172
BE60.00-P-1001-01Y Gap dimension Engine hood to fender Dimension "A" mm 4, 0 (+1/-0, 5)
Engine hood to headlamp Dimension "R" mm 4, 0 (± 1)
Radiator grille to headlamp Dimension "N" mm -
Engine hood to bumper Dimension "B" mm 4, 0 (± 1)
Fender to headlamp Dimension "C" mm 4, 0 (+1/-1, 5)
Bumper to headlamp (circumferential) Dimension "D" mm 3, 5 (± 1, 5)
Mounting rail, bumper to engine hood Dimension "I" Outside mm 39, 5 (-1, 0)
Center mm 58, 5 (-1, 0)
Picture AR60.00-P-0700-01V
Fig 2: Identifying Feeler Gauge (129 589 03 21 00)
G11129153Courtesy of MERCEDES-BENZ USA