Retrofit trailer coupling - AN31.10-P-8080G

MODEL /215.375 /31.8.02 /378 1# except CODE (772) AMG styling package - front spoiler, side skirts and rear apron MK1 mechanical swing-away trailer coupling 

MODEL 215.375 /378 1# as of 1.9.02, 215.376 1# except CODE (772) AMG styling package - front spoiler, side skirts and rear apron except CODE (855) TELE AID mechanical swing-away trailer hitch MK1 

Fig 1: Identifying Retrofit Trailer Coupling Function

	Remove
	Notes on EU type approval requirements	Applies only to countries within the European Union. Information on obtaining approval for installed trailer hitches at an approved inspection station (Technical Inspection Association).	AH31.10-P-1000-03T
	Notes on installing a trailer coupling		AH31.10-P-1000-02G
1	Connect no load current retention unit		*WH58.30-Z-1012-09A
2	Remove battery
			AR54.10-P-0005I
3	Remove coverings in trunk	The rear wall paneling does not need to be removed.
			AR68.30-P-4600M
4.1	Remove CD changer
		With CODE (819) CD changer in luggage compartment (6CDs).	AR82.64-P-7507I
5	Remove plastic cover in left rain trough on rear fender
6	Remove rear seat cushion
			AR91.12-P-1020N
7	Remove rear seat backrest
8	Remove right backrest side panel
9	Fold back insulation mat behind right rear seat
10	Remove control unit holder below right rear seat
11	Remove fuse box in rear compartment
12	Remove rear bumper
			AR88.20-P-2200NA
13	Remove exhaust system as of flange connection	Refer to Removing exhaust system complete: ↓
		Engine 113.960 in model 215.375.	AR49.10-P-7000AA
		Engine 137.970 in model 215.378.	AR49.10-P-7000L
		Engine 275.950 in model 215.376.	AR49.10-P-7280M
14	Remove screens at left and right above the rear muffler
	Install
15	Retrofit mechanical detachable parts	Do not remove the transport locking element on the swiveling ball neck until the release lever has been installed.	AN31.11-P-8080-05N
		Nut, trailer coupling to rear center assembly	*BA31.11-P-1001-01A
		Bolt, trailer coupling to side member reinforcement	*BA31.11-P-1002-01A
		Collar nut, side member reinforcement to frame side member	*BA31.11-P-1003-01A
		Bolt, bumper to bumper reinforcement	*BA31.11-P-1004-01A
16	Retrofit release lever		AN31.11-P-8080-06N
17	Retrofit trailer coupling control unit		AN31.19-P-8080-05N
18	Connect wiring harness		AN31.19-P-8080-03N
19	Install rear bumper
		Rear bumper with trailer coupling.	AR88.20-P-2200N
		Nut, bumper reinforcement to trailer coupling	*BA31.11-P-1005-01A
20	Install remaining parts onto vehicle
	Check
21	Perform version coding subsequently	For trailer hitch code 550.
22	Conduct operational check of swivel-mounted trailer coupling	When the trailer hitch is not engaged the LED in the release lever of the trailer hitch release (A63) starts to flash (see arrow). The LED stops flashing when the engagement at an end position occurs or after approx. 8 min.
23	Performing function test of light signals at trailer coupling socket

The following applies throughout the European Union:

TRAILER COUPLING MECHANICAL SYSTEM