Removing And Installing Heater Control Module - Ar83.70-S-5940S

Model 906 with engine 642, 651 

with code H12 (Auxiliary hot-water heater) 

except code PE4 (DCAA bus master code, Argen) 

except code PE5 (Mastercode, bus seats on raised base, Argen) 

Courtesy of MERCEDES-BENZ USA

	Remove
1	Remove STH heater (A6) from bracket.		AR83.70-S-5331S
2	Completely remove protective foil (1).
3	Unscrew bolts (2).
4	Lift STH control unit (A6n1) slightly and disconnect electrical connector (3).
5	Remove STH control unit (A6n1) from STH heater (A6).
	Install
6	Attach STH control unit (A6n1) to STH heater (A6).	Ensure that the STH control unit (A6n1) and the feed-through grommet are correctly seated.
7	Connect electrical connector (3).	Ensure that the electrical connector (3) is correctly seated.
8	Tighten screws (2).
9	Attach new protective foil (1).		AR83.70-S-5331-01S
10	Attach STH heater (A6) to bracket.		AR83.70-S-5331S