Remove/install control and operating unit for automatic heater - AR83.25-P-1125V

MODEL 171.4 except CODE (580) Automatic air conditioning except CODE (581) Comfort automatic air conditioning

Fig 1: Identifying Automatic Heater Control And Operating Unit Components

Courtesy of MERCEDES-BENZ USA

MODIFICATION NOTES

5.7.06

"Disconnect/connect battery ground line" removed

	Remove/install
1.1	Buffer basic data of HEAT [HAU] control and operating unit (N18) in STAR DIAGNOSIS	When replacing the HEAT [HAU] control and operating unit (N18). Installation: Transfer buffered basic data to the new HEAT [HAU] control and operating unit (N18).
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
		STAR DIAGNOSIS diagnosis system	*WE58.40-Z-1013-06A
2	Remove stowage compartment or ashtray housing		AR68.20-P-2420V
3	Pull HEAT [HAU] control and operating unit (N18) out of the fixtures (arrow) at the upper control panel control unit (N72/1) and tilt downwards until the electrical connectors (1) are accessible	Installation: Ensure that the HEAT [HAU] control and operating unit (N18) is correctly seated in the fixtures (arrow) at the upper control panel control unit (N72/1).
4	Disconnect electrical connectors (1) and remove HEAT [HAU] control and operating unit (N18)
5	Install in the reverse order

WORKSHOP EQUIPMENT/MB TESTERS (SEE WORKSHOP EQUIPMENT MANUAL)

WE58.40-Z-1013-06A

STAR DIAGNOSIS Compact diagnosis system for passenger cars, order number 6511 1801 00