Remove and install heat exchanger - AR83.25-P-1100V

MODELS 171.4 

Shown for code (581b) comfort automatic air conditioning 

Fig 1: Identifying Heat Exchanger Components - Shown For Code (581B) Comfort Automatic Air Conditioning

Courtesy of MERCEDES-BENZ USA

Shown for code (581b) comfort automatic air conditioning 

Fig 2: Identifying Heat Exchanger Components - Shown For Code (581B) Comfort Automatic Air Conditioning

Courtesy of MERCEDES-BENZ USA

	Removal/installation
1.1	Remove heater unit	For vehicles without code (580a) automatic air conditioning. or without code (581b) comfort automatic air conditioning	AR83.25-P-1000V
1.2	Remove AC housing	For vehicles with code (580a) automatic air conditioning. or with code (581b) comfort automatic air conditioning	AR83.30-P-5200V
2	Detach electrical connector on left and right defroster flaps actuator motor (M2/16)
3.1	Detach electrical connector on fresh air flaps actuator motor (M2/21)	On vehicles with code (581b) convenience automatic air conditioning
4	Remove AC bus wiring harness (2) from fixtures (3) and put aside
5	Remove bolts (4)
6	Remove left heat exchanger temperature sensor (B10/2) and right heat exchanger temperature sensor (B10/3) from upper part of housing (6)
7	Release retaining clamps (5)
8	Remove top section of housing (6)	In doing so lift up the air ducting (7) and route the defroster flaps shaft (8) past the heat exchanger (1) and air ducting (7)
9	Undo screws (9) and remove pipeline holder (10)
10	Remove sealing (11) from connecting pipe (12)
11	Raise air ducting (7) and remove heat exchanger (1)	Carefully remove heat exchanger (1), as otherwise the cooling fins of the heat exchanger (1) may be damaged.
12.1	Detach seal (13)	When replacing the heat exchanger (1)
13	Install in the reverse order