Remove/install rain/light sensor - AR82.30-P-7800MCC

MODEL 451.3/4 with CODE (V54) Rain/light sensor 

Fig 1: Identifying Rain/Light Sensor Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove
1	Remove inside rearview mirror	* for USA only	AR68.40-P-0001MCU
		except USA	AR68.40-P-0001MCC
2	Unclip cover (1) from the retaining collar (3) and detach cable routing (2) out of the cover (1)	Carefully unclip cover (1) to prevent the retaining clips from breaking.
3	Disconnect electrical connector (4)
4	Unclip retaining clip (5) for rain sensor/light sensor (B38) at retaining collar (3) (arrows)
5	Remove rain sensor/light sensor (B38) from the retaining collar (3)	The rain sensor/light sensor (B38) must always be replaced after removing from the windshield.
	Install
6.1	Remove protective cap from retaining collar (3)	When replacing the windshield. With the new windshield, the contact surface of the rain sensor/light sensor (B38) is protected from soiling by means of a protective cap. The protective cap is clipped into the retaining collar (3).
6.2	Clean contact surface of rain sensor/light sensor (B38) on windshield	Only if the windshield was not protected from dirt by a protective cap. The contact surface must be clean and free of grease.
7	Carefully pull off protective foil from new rain sensor/light sensor (B38)	If the silicone pad on the optics of the rain sensor/light sensor (B38) is damaged or dirty, this must be replaced.
8	Insert rain sensor/light sensor (B38) into the retaining collar (3)	The contact surfaces of the rain sensor/light sensor (B38) must not be damaged or dirty, as this will result in the rain sensor/light sensor (B38) being unusable.
9	Clip in retaining clip (5) for rain sensor/light sensor (B38) at retaining collar (3) (arrows)
10	Insert cable routing (2) into cover (1)
11	Connect electrical connector (4)
12	Clip cover (1) into retaining collar (3)	Carefully clip in cover (1) to prevent the retaining clips from breaking.
13	Install inside rearview mirror	* for USA only	AR68.40-P-0001MCU
		except USA	AR68.40-P-0001MCC
14	Carry out function check