Retrofit trailer hitch · an3110s8080eb · Mercedes-Benz WIS

AN31.10-S-8080EB

Retrofit trailer hitch

19.08.2020

Model	447.7
	except code 771L (Argentina version)
	except code 775L (Brazil version)
	except code 777L (Chile version)
	except code E57 (Electrics for trailer socket)
	except code E58 (Electrics for NAFTA trailer socket)
	except code XM0 (Facelift)

Modification notes

15.07.2019

Method extended and document revised

Operation steps 5, 6, 7, 8, 9

AN31.19-S-8100-05E

Shown on model 447.7 with code Q50 (Trailer hitch with removable ball head), with code V23 (Interior trim, superior version)

1	Stowage compartment cover
2	Trailer hitch crossmember
N28/1	Trailer recognition (AAG) control unit

S31.10-4521-06

3	Vehicle tool kit mount
4	Screw

S68.30-4693-06

 Danger	Risk of death caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
Topical note	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
Topical note	Special instructions for lifting and supporting vehicle		AH00.60-N-0100-01A
Topical note	Notes on installing a trailer hitch		AH31.10-P-1000-02B
Topical note	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
Topical note	Notes on carrying out repair work in the vehicle interior		AH68.00-N-0001-01S
	Remove
1	Detach ground line of on-board electrical system battery.
			AR54.10-S-0003E
2	Remove stowage compartment cover (1).	Model 447.7 with code V23 (Interior trim, superior version)
3	Remove jack.	Model 447.7 with code RR6 (Spare wheel with vehicle jack) with code V23 (Interior trim, superior version) Model 447.7 with code V23 (Interior trim, superior version) with code Y36 (Vehicle jack)
4.1	Remove vehicle tool kit mount (3).	All vehicles with vehicle tool kit mount (3)
			AR68.30-S-5020E
4.2	Remove stowage compartment in right rear passenger compartment.	Model 447.7 with code V23 (Interior trim, superior version) except code E28 (Additional battery for retrofitted consumers) except code RR6 (Spare wheel with vehicle jack) except code SB6 (Comfort front passenger seat, swiveling) except code Y36 (Vehicle jack) except code ZG2 (Permanent all-wheel drive)
			AR68.00-S-0009E
		If the trailer hitch with removable ball head is to be retrofitted,
		
		the stowage compartment at the right in the rear passenger compartment is replaced by the vehicle tool kit mount (3) and can be disposed of properly after removal.
4.3	Remove rear right load compartment trim.	Model 447.7 except code E28 (Additional battery for retrofitted consumers) except code RR6 (Spare wheel with vehicle jack) except code SB6 (Comfort front passenger seat, swiveling) except code V23 (Interior trim, superior version) except code Y36 (Vehicle jack)
			AR68.30-S-1180E
		 Only remove the lower load compartment paneling.
4.4	Remove rear right side trim in rear passenger compartment.	Model 447.7 with code V23 (Interior trim, superior version) with code ZG2 (Permanent all-wheel drive) except code E28 (Additional battery for retrofitted consumers) except code RR6 (Spare wheel with vehicle jack) except code SB6 (Comfort front passenger seat, swiveling) except code Y36 (Vehicle jack)
			AR68.30-S-1206E
5	Remove rear bumper.
			AR88.20-S-2200E
6	Remove carrier of rear bumper.
		Model 447.7 with code Z42 (Registration as passenger car)	AR88.20-S-2250E
		 The carrier for the rear bumper is no longer required and can be disposed of properly after removal.
7	Remove towing eye from rear crossmember.
		Model 447.7	AR64.20-S-1203E
		 The towing eye is no longer required and can be disposed of properly after removal.
8.1	Remove rear roof lining.	Model 447.7 except code V23 (Interior trim, superior version) Model 447.7 with code D57 (Full-width partition wall at C-pillar with window) with code V23 (Interior trim, superior version)
		Model 447.7 with code D57 (Full-width partition wall at C-pillar with window) with code V23 (Interior trim, superior version)	AR68.30-S-7608E
		Model 447.7 except code V23 (Interior trim, superior version)	AR68.30-S-7618E
8.2	Remove door sill from sliding door.	Model 447.7 with code V23 (Interior trim, superior version) except code D57 (Full-width partition wall at C-pillar with window)
			AR68.30-S-1312E
9.1	Remove lower B-pillar trim at right.	Model 447.7 with code V23 (Interior trim, superior version) except code D57 (Full-width partition wall at C-pillar with window)
			AR68.30-S-4700E
9.2	Remove right A-pillar trim.	Model 447.7 except code V23 (Interior trim, superior version)
			AR68.30-S-4050E
10	Remove front roof lining.
		Model 447.7 with code D57 (Full-width partition wall at C-pillar with window) with code V23 (Interior trim, superior version) Model 447.7 with code SH9 (Window airbag for driver and front passenger) except code V23 (Interior trim, superior version)	AR68.30-S-7607E
11	Remove door sill on front passenger side.
		Model 447.7 with code V23 (Interior trim, superior version) except code D57 (Full-width partition wall at C-pillar with window)	AR68.30-S-4100E
12	Remove trim in right footwell.
		Model 447.7 with code V23 (Interior trim, superior version) except code D57 (Full-width partition wall at C-pillar with window)	AR68.30-S-4030E
13	Remove right cover below the instrument panel.
		Model 447.7 with code LC7 (Front footwell illumination)	AR68.10-S-1520E
14.1	Remove glove compartment.	Model 447.7 with code F66 (Glove compartment, lockable)
			AR68.10-S-1400E
14.2	Remove stowage compartment.	Model 447.7 except code F66 (Glove compartment, lockable)
			AR68.10-S-1610E
	Install
15	Retrofit trailer hitch preinstallation electrical wiring harness.
	Assignment of right footwell firewall fuse and relay module		GF54.15-S-1256-39TRA
		Model 447.7## 1# with code V23 (Interior trim for luxury version) except code D57 (Full-width partition wall to C-pillar with window)	AN31.19-S-8100-04E
		Model 447.7## 1# except code V23 (interior trim for luxury version) Model 447.7## 1# with code D57 (Full-width partition wall to C-pillar with window) with code V23 (Interior trim for luxury version)	AN31.19-S-8100-04EA
		Model 447.7## 2# with code V23 (Interior trim for luxury version) except code D57 (Full-width partition wall to C-pillar with window)	AN31.19-S-8100-04EB
		Model 447.7## 2# except code V23 (interior trim for luxury version) Model 447.7## 2# with code D57 (Full-width partition wall to C-pillar with window) with code V23 (Interior trim for luxury version)	AN31.19-S-8100-04EC
		 Long wedge	*115589035900
16.1	Install glove compartment.	Model 447.7 with code F66 (Glove compartment, lockable)
			AR68.10-S-1400E
16.2	Install stowage compartment.	Model 447.7 except code F66 (Glove compartment, lockable)
			AR68.10-S-1610E
17	Install right cover below the instrument panel.
		Model 447.7 with code LC7 (Front footwell illumination)	AR68.10-S-1520E
18	Install trim in right footwell.
		Model 447.7 with code V23 (Interior trim, superior version) except code D57 (Full-width partition wall at C-pillar with window)	AR68.30-S-4030E
19	Install front passenger side door sill.
		Model 447.7 with code V23 (Interior trim, superior version) except code D57 (Full-width partition wall at C-pillar with window)	AR68.30-S-4100E
20	Install front roof lining.
		Model 447.7 with code D57 (Full-width partition wall at C-pillar with window) with code V23 (Interior trim, superior version) Model 447.7 with code SH9 (Window airbag for driver and front passenger) except code V23 (Interior trim, superior version)	AR68.30-S-7607E
21.1	Install lower B-pillar trim at right.	Model 447.7 with code V23 (Interior trim, superior version) except code D57 (Full-width partition wall at C-pillar with window)
			AR68.30-S-4700E
21.2	Install right A-pillar trim.	Model 447.7 except code V23 (Interior trim, superior version)
			AR68.30-S-4050E
22.1	Install rear roof lining.	Model 447.7 except code V23 (Interior trim, superior version) Model 447.7 with code D57 (Full-width partition wall at C-pillar with window) with code V23 (Interior trim, superior version)
		Model 447.7 with code D57 (Full-width partition wall at C-pillar with window) with code V23 (Interior trim, superior version)	AR68.30-S-7608E
		Model 447.7 except code V23 (Interior trim, superior version)	AR68.30-S-7618E
22.2	Install door sill on sliding door.	Model 447.7 with code V23 (Interior trim, superior version) except code D57 (Full-width partition wall at C-pillar with window)
			AR68.30-S-1312E
23	Retrofit trailer hitch electrical wiring harness.		AN31.19-S-8100-05E
		 The trailer recognition (AAG) control unit (N28/1) is also installed at the same time.
		 M8	*BA00.10-N-1003-01A
		 Long wedge	*115589035900
24	Install trailer hitch crossmember (2) with coupling ball.		AN31.11-S-8080-04E
		 Screw/bolt, trailer hitch crossmember to longitudinal member	*BA31.10-N-1001-01J
25	Make bumper cutout retroactively.		AN31.11-S-8080-08E
		 Commercially available devices/tools Body saw
26	Install rear bumper.
			AR88.20-S-2200E
27.1	Install rear right side trim in rear passenger compartment.	Model 447.7 with code V23 (Interior trim, superior version) with code ZG2 (Permanent all-wheel drive) except code E28 (Additional battery for retrofitted consumers) except code RR6 (Spare wheel with vehicle jack) except code SB6 (Comfort front passenger seat, swiveling) except code Y36 (Vehicle jack) Only when retrofitting the trailer hitch with non-removable ball head.
			AR68.30-S-1206E
27.2	Install stowage compartment in right rear passenger compartment.	Model 447.7 with code V23 (Interior trim, superior version) except code E28 (Additional battery for retrofitted consumers) except code RR6 (Spare wheel with vehicle jack) except code SB6 (Comfort front passenger seat, swiveling) except code Y36 (Vehicle jack) except code ZG2 (Permanent all-wheel drive) Only when retrofitting the trailer hitch with non-removable ball head.
			AR68.00-S-0009E
28	Install rear right load compartment trim.
		Model 447.7 except code E28 (Additional battery for retrofitted consumers) except code RR6 (Spare wheel with vehicle jack) except code SB6 (Comfort front passenger seat, swiveling) except code V23 (Interior trim, superior version) except code Y36 (Vehicle jack)	AR68.30-S-1180E
		If the trailer hitch with removable ball head is to be retrofitted,
		
		replace the previously removed lower load compartment trim with an appropriate version for the retrofit installation of the vehicle tool kit carrier (3).
29.1	Install vehicle tool kit mount (3).	All vehicles with vehicle tool kit mount (3)
			AR68.30-S-5020E
		If the trailer hitch with non-removable ball head is to be retrofitted,
		
		use the previously removed vehicle tool kit mount (3).
		If the trailer hitch with removable ball head is to be retrofitted,
		
		use the vehicle tool kit mount (3) provided in the parts kit.
29.2	Retrofit vehicle tool kit mount (3) from parts kit.	Model 447.7 except code E28 (Additional battery for retrofitted consumers) except code RR6 (Spare wheel with vehicle jack) except code SB6 (Comfort front passenger seat, swiveling) except code Y36 (Vehicle jack) Only when retrofitting the trailer hitch with removable ball head.
		 To do this, secure the vehicle tool kit carrier (3) with screws (4). Do not install the cap of the vehicle tool kit mount (3) yet.
30	Install jack.	Model 447.7 with code RR6 (Spare wheel with vehicle jack) with code V23 (Interior trim, superior version) Model 447.7 with code V23 (Interior trim, superior version) with code Y36 (Vehicle jack)
31	Install cap of vehicle tool kit mount (3).	Model 447.7 except code E28 (Additional battery for retrofitted consumers) except code RR6 (Spare wheel with vehicle jack) except code SB6 (Comfort front passenger seat, swiveling) except code Y36 (Vehicle jack) Only when retrofitting the trailer hitch with removable ball head.
32	Install rear right side trim in rear passenger compartment.	Only when retrofitting the trailer hitch with removable ball head.
		Model 447.7 with code V23 (Interior trim, superior version) except code E28 (Additional battery for retrofitted consumers) except code RR6 (Spare wheel with vehicle jack) except code SB6 (Comfort front passenger seat, swiveling) except code Y36 (Vehicle jack)	AR68.30-S-4780E
33	Install stowage compartment cover (1).	Model 447.7 with code V23 (Interior trim, superior version)
34	Attach ground line of on-board electrical system battery.
			AR54.10-S-0003E
35	Supplement special equipment in Vehicle Documentation (VeDoc).	 Designation of relevant special equipment: Code Q50 (Trailer hitch with removable ball head) or code Q22 (Trailer hitch with non-removable ball head).
36	Perform SCN coding on electronic ignition lock (EIS) control unit (N73).
			AR54.21-S-0015E
		 Under the menu item "Control unit adaptations", follow the instructions for "SCN coding".
		 Do not yet remove vehicle diagnosis system.
37	Perform SCN coding on signal acquisition and actuation module (SAM) control unit (N10/1).
			AR54.21-S-0015E
		 Under the menu item "Control unit adaptations", follow the instructions for "SCN coding".
		 Do not yet remove vehicle diagnosis system.
38	Perform SCN coding on radio (Audio) (N87/2).
		Model 447.7 with code EN6 (Audio 10) Model 447.7 with code EN7 (Audio 15)	AR54.21-S-0015E
		 Under the menu item "Control unit adaptations", follow the instructions for "SCN coding".
		 Do not yet remove vehicle diagnosis system.
39	Perform SCN coding on Electronic Stability Program (ESP) control unit (N30/4).
			AR54.21-S-0015E
		 Under the menu item "Control unit adaptations", follow the instructions for "SCN coding".
		 Do not yet remove vehicle diagnosis system.
40	Perform SCN coding on Parktronic (PTS) control unit (N62).
		Model 447.7 with code EZ5 (Parking package) Model 447.7 with code EZ7 (Active Parking Assist)	AR54.21-S-0015E
		 Under the menu item "Control unit adaptations", follow the instructions for "SCN coding".
		 Do not yet remove vehicle diagnosis system.
41	Perform SCN coding at reversing camera (RFK) control unit (B84/3) or rear-end door reversing camera (RFK) control unit (B84/10).
		Model 447.7 with code FR8 (Reversing camera)	AR54.21-S-0015E
		 Under the menu item "Control unit adaptations", follow the instructions for "SCN coding".
	Check
42	Perform function check on trailer socket.		AN31.19-S-8100-06E
	000 588 00 63 00 Test box		WS82.00-P-0027B
	Convert radiator
43	Remove radiator installed as standard and replace with a more efficient one.
		Model 447.7 with engine 622.9 with code HH4 (THERMOTRONIC automatic air conditioning) Model 447.7 with engine 622.9 with code HH9 (Semi-automatically controlled A/C, TEMPMATIC)	AR20.20-S-3865EF
		 The removed radiator is no longer used and can be disposed of properly.
	Convert electric fan
44	Remove standard-equipment electric fan and replace it with a higher-performance electric fan.
		Model 447.7 with engine 622 with code HH4 (THERMOTRONIC automatic air conditioning) Model 447.7 with engine 622 with code HH9 (Semi-automatically controlled A/C, TEMPMATIC)	AR20.40-S-5000EF
		Model 447.7 with engine 651 except code H09 (Air conditioning with increased output) except code HH4 (THERMOTRONIC automatic air conditioning) except code HH9 (Semi-automatically controlled A/C, TEMPMATIC) Model 447.7 with engine 651 with code HH4 (THERMOTRONIC automatic air conditioning) except code H09 (Air conditioning with increased output) Model 447.7 with engine 651 with code HH9 (Semi-automatically controlled A/C, TEMPMATIC) except code H09 (Air conditioning with increased output)	AR20.40-S-5000E
		 Model 447.7 with engine 622 with code HH4 (THERMOTRONIC automatic climate control) or with code HH9 (TEMPMATIC semi-automatic climate control)) model 447.7 with engine 651 except code H09 (Air conditioning with increased output) except code HH4 (THERMOTRONIC automatic climate control) except code HH9 (TEMPMATIC semi-automatic climate control)) Use a 600 W electric fan.
		 Model 447.7 with engine 651 with code HH4 (THERMOTRONIC automatic climate control) except code H09 (Air conditioning with increased output) or with code HH9 (TEMPMATIC semi-automatic climate control) except code H09 (Air conditioning with increased output)) Use a 850 W electric fan.
		 The removed electric fan is no longer used and can be disposed of properly.

 Headless screws/bolts: screws/bolts and nuts, coarse-pitch thread

Number	Designation			8.8	10.9
BA00.10-N-1003-01A	M8	Galvanized	Nm	23	32
		Phosphated	Nm	21	29

 Headless screws/bolts: screws/bolts and nuts, coarse-pitch thread

Number	Designation			12.9
BA00.10-N-1003-01A	M8	Galvanized	Nm	38
		Phosphated	Nm	36

 Trailer hitch

Number	Designation		Model 447
BA31.10-N-1001-01J	Screw/bolt, trailer hitch crossmember to longitudinal member	Nm	90

115 589 03 59 00

Long wedge

Parts ordering note

Part no.	Designation	Quantity
KG99	Trailer hitch package contents	1

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