Remove/install heater/ventilation operating unit - AR83.20-P-1850MCF

MODEL 451.3/4 as of 31.8.10 except CODE (I01) Air conditioning Plus 

Fig 1: Identifying Heater/Ventilation Operating Unit Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove center air vent		AR68.10-P-1150MCF
2	Remove bolts (1)
3	Unhook heater operating unit/A/C (N23) from bracket (arrow) at left and right and remove	Note installation position of flexible shaft (2).
4	Remove flexible shaft (2)	When the operating unit is replaced Heater/AC (N23).	AR83.10-P-1401MCC
5	Remove heater control cable	When the operating unit is replaced Heater/AC (N23). * not for USA	AR83.20-P-1400MCC
		* for USA only	AR83.20-P-1400MCU
6	Install in the reverse order
7	Perform function test on heater/air conditioning operating unit (N23)