Remove/Install Headlamp Unit - AR82.10-P-4730W

Model 172.4 

except code 640 (High-performance LED) 

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

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

Courtesy of MERCEDES-BENZ USA

Shown on model 172.4 up to model year 2016 on front left Headlamp unit with code 621 (Intelligent Light System (left-hand traffic)) 

Fig 1: Headlamp Unit Components Location - Model 172.4 Except Code 640, 641, 642 (Shown On Front Left Headlamp Unit With Code 615, 621, 622)

Courtesy of MERCEDES-BENZ USA

Shown on front left Headlamp unit with code 615 (Bi-xenon headlamp with active curve lights), code 621 (Intelligent Light System (left-hand traffic)), code 622 (Intelligent Light System) 

Courtesy of MERCEDES-BENZ USA

	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
	Risk of explosion/risk of fire  caused by highly flammable materials in the vicinity of damaged xenon bulbs. Risk of injury  caused by UV light, hot components on xenon headlamps and glass splinters produced by bursting xenon bulbs. Risk of poisoning  caused by inhalation of mercury vapors and by swallowing of/skin contact with toxic salts and mercury compounds.	Do not touch parts conducting high voltage. Persons with active electronic implants  (e.g. cardiac pacemakers) must never work on xenon headlamps. Switch off the entire lighting system. Wear insulated safety shoes, safety glasses and protective gloves. Remove highly inflammable materials from the danger zone. Ensure sufficient ventilation in the working area.	AS82.10-Z-0001-01A
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove
1	Remove front bumper		AR88.20-P-2000W
2	Unscrew nuts (2)
3	Remove screws (3, 4) and remove mounting rail (1)
4	Release telescopic nozzle (5) at catch hook (arrow) and remove forwards from the front right or left Headlamp unit (15)	Model 172.4 with code 600 (Headlamp cleaning system) except code 640 (High-performance LED) except code 641 (Dynamic LED headlamps, left-hand traffic) except code 642 (Dynamic LED headlamps, right-hand traffic)
5	Open service flap (6) on fender liner (7)
6	Release and disconnect electrical connector (10)
7	Remove screw/bolt (8) and remove mount (9)
8	Remove screw (11) from below
9	Remove screw/bolts (12)
10	Remove right or left front Headlamp unit (15)
11	Remove xenon light power supply module (15a) from front right or left Headlamp unit (15) and mount onto new front right or left Headlamp unit (15)	Model 172.4 with code 615 (Bi-xenon headlamps with active light function) except code 640 (High-performance LED) except code 641 (Dynamic LED headlamps, left-hand traffic) except code 642 (Dynamic LED headlamps, right-hand traffic) Model 172.4 with code 621 (Intelligent Light System (left-hand traffic)) except code 640 (High-performance LED) except code 641 (Dynamic LED headlamps, left-hand traffic) except code 642 (Dynamic LED headlamps, right-hand traffic) Model 172.4 with code 622 (Intelligent Light System) except code 640 (High-performance LED) except code 641 (Dynamic LED headlamps, left-hand traffic) except code 642 (Dynamic LED headlamps, right-hand traffic) When replacing front right or left Headlamp unit (15).	AR82.10-P-4632W
	Install
12	Insert front right or left Headlamp unit (15) and connect electrical connector (10) of front right or left Headlamp unit (15)
13	Tighten screws (11, 12) and screw (8) with mount (9) lightly by hand	Check gap dimensions of Headlamp unit. In the case of complaints. ↓ Adjust gap dimensions.	AR60.00-P-0700-01V
		Gap dimension	*BE60.00-P-1001-01Y
		Feeler gauge	Fig 2
14	Tighten screws (8, 11, 12)
15	Close service flap (6) on fender liner (7)
16	Install telescopic nozzle (5)	Model 172.4 with code 600 (Headlamp cleaning system) except code 640 (High-performance LED) except code 641 (Dynamic LED headlamps, left-hand traffic) except code 642 (Dynamic LED headlamps, right-hand traffic) Make sure that catch hook engages correctly on telescopic nozzle.
17	Insert mounting rail, tighten screws (3, 4) and nuts (2)
18	Install front bumper		AR88.20-P-2000W
	Check
19	Check headlamp setting and correct if necessary
			AP82.10-P-8260V

Fig 2: Identifying Feeler Gauge (129 589 03 21 00)

Courtesy of MERCEDES-BENZ USA