Air recirculation unit, remove/install - AR83.10-P-0100MCU

MODEL 451.3/4 

Fig 1: Identifying Air Recirculation Unit Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove heater/air conditioner housing (3)	Model 451 (except 451.391/491) with code (I01) Air conditioning Plus	AR83.30-P-5200MCU
		Model 451 (except 451.391/491) without code (I01) Air conditioning Plus	AR83.25-P-1000MCU
		Model 451.391/491	AR83.30-P-5200MEV
2	Disconnect electrical connector (2) from air recirculation flap actuator motor (M39)	On vehicles with code (I01) Air conditioning Plus
3	Release air recirculation unit (1) from heater/air conditioner housing (3) by twisting and remove	Ensure that the seal (4) is correctly located.
4	Remove air recirculation flap actuator motor (M39) from air recirculation unit (1)	When replacing the air recirculation unit (1) in vehicles with code (I01) Air conditioning Plus.
5	Install in the reverse order