(Retrofit Trailer Hitch - AN31.10-P-8080LWG)

Model 253.9 (except 253.992/993) as of 7/1/16 up to 5/31/19 

with code 460 (Canada version) 

except code 36P (AMG Styling package) 

except code 494 (US version) 

except code 5U1 (Aluminum rear axle carrier) 

except code 737L (Mexico) 

except code 830 (China version) 

except code 835 (South Korea version) 

except code U98 (LITHIUM-ION-STARTERBATTERY (LISB)) 

Model 253.9 (except 253.992/993) as of 7/1/16 up to 5/31/19 

with code 494 (US version) 

except code 36P (AMG Styling package) 

except code 460 (Canada version) 

except code 5U1 (Aluminum rear axle carrier) 

except code 737L (Mexico) 

except code 830 (China version) 

except code 835 (South Korea version) 

except code U98 (LITHIUM-ION-STARTERBATTERY (LISB)) 

Model 253.9 (except 253.992/993) up to 6/30/16 

with code 460 (Canada version) 

except code 36P (AMG Styling package) 

except code 494 (US version) 

except code 5U1 (Aluminum rear axle carrier) 

except code 737L (Mexico) 

except code 830 (China version) 

except code 835 (South Korea version) 

except code U98 (LITHIUM-ION-STARTERBATTERY (LISB)) 

Model 253.9 (except 253.992/993) up to 6/30/16 

with code 494 (US version) 

except code 36P (AMG Styling package) 

except code 460 (Canada version) 

except code 5U1 (Aluminum rear axle carrier) 

except code 737L (Mexico) 

except code 830 (China version) 

except code 835 (South Korea version) 

except code U98 (LITHIUM-ION-STARTERBATTERY (LISB)) 

Courtesy of MERCEDES-BENZ USA

Courtesy of MERCEDES-BENZ USA

Shown with CODE P17 (KEYLESS-GO package) 

Courtesy of MERCEDES-BENZ USA

	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
	Risk of injury  . Skin or eye injuries may result when handling hot or glowing objects.	Wear protective gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
	Risk of injury  caused by scraping or cutting body parts on sharp vehicle parts	Always wear protective gloves when working on or near sharp and non-deburred vehicle parts. Deburr repair panels.	AS00.00-Z-0017-01A
Notice	Notes on retrofitting electrical/optical lines		AH82.00-P-0000-01A
Notice	Notes on self-locking nuts and bolts		AH00.00-P-0001-01KOA
Notice	Notes on installing a trailer hitch		AH31.10-P-1000-02CW
Notice	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Notes on safety-relevant components		AH00.00-Z-0019-01A
	Remove
1	Print out the detailed installation instructions and hand them over to the customer.	For do-it-yourself installation of trailer hitch by the customer.
2	Remove spare wheel well trim.
3	Remove trim at right and left on side of load compartment.
			AR68.30-P-1180LWG
4	Remove side trim from rear passenger compartment on right.
			AR68.30-P-4780EQ
5	Remove trim from right B-pillar.
			AR68.30-P-4700LW
6	Remove door sills at front right and left and door sill at rear right.
			AR68.30-P-4100LW
7	Remove front seats.
			AR91.10-P-1000LW
8	Remove right front floor covering.
			AR68.20-P-2070LW
9	Remove floor covering at front left.
			AR68.20-P-2050LW
10	Remove center console.
		Model 253.9 with transmission 716	AR68.20-P-2000LWA
		Model 253.9 with transmission 724, 725	AR68.20-P-2000LWG
11	Remove cover below instrument panel at right.
			AR68.10-P-1520LW
12	Remove left covering under instrument panel.
			AR68.10-P-1500LW
13	Release fuse box on right A-pillar.
			AR54.15-P-1311LWG
14	Remove rear bumper (70).
			AR88.20-P-2200LWG
15	Remove rear switch module lower sensor (A87/2) and rear switch module upper sensor from rear bumper (70).
		Model 253.9 with code P17 (KEYLESS-GO Package)	AR80.61-P-0012LW
16	Unfasten rubber retainers on rear muffler.	Antifriction paste, rubber parts 2.5 kg, DBL 6867.00	*BR00.45-Z-1002-06A
17	Remove crossmember (6).	The removed crossmember (6) is no longer required.
18	In the XENTRY Portal Parts Information in DG 99, check if the rear engine compartment lining installed in accordance with the vehicle equipment can be used for retrofitting the trailer hitch.	If the rear engine compartment lining is incompatible ↓ Remove engine compartment lining at rear.
		The removed engine compartment lining at the rear is no longer required.	AR61.20-P-1105LW
19	In the XENTRY Portal Parts Information in DG 99, check if the fuse and relay module installed in the rear passenger compartment in accordance with the vehicle equipment can be used for retrofitting the trailer hitch.	If the fuse and relay module in the rear passenger compartment is compatible, ↓ expose rear fuse and relay module until the electrical connections are accessible.
		If the fuse and relay module in the rear passenger compartment is incompatible, ↓ replace rear fuse and relay module.	AR54.15-P-0001LW
		The removed rear fuse and relay module is no longer required.	AR54.15-P-0001LW
20	In the XENTRY Portal Parts Information in DG 99, check if the cooler installed in accordance with the vehicle equipment can be used for retrofitting the trailer hitch.	Model 253.9 with engine 274.9, 276.8, 642, 651 If the cooler is incompatible, ↓ replace the cooler.
		The removed cooler is no longer required.	AR20.20-P-3865RF
21	In the XENTRY Portal Parts Information in DG 99, check if the automatic transmission oil lines installed according to the vehicle equipment can be used for retrofitting the trailer hitch.	Model 253.9 with engine 274, 651 with transmission 725.0 with code M005 (4MATIC), model 253.9 with engine 274, 651 with transmission 725.0 except code M005 (4MATIC), model 253.9 with engine 274.9 with transmission 724.2 If the automatic transmission oil lines are incompatible, ↓ replace automatic transmission oil lines.
		Model 253.9 with engine 274.9 with transmission 724.2	AR27.55-P-0600LWH
		Model 253.9 with engine 274, 651 with transmission 725.0 except code M005 (4MATIC)	AR27.55-P-0600MRE
		Model 253.9 with engine 274, 651 with transmission 725.0 with code M005 (4MATIC) The removed automatic transmission oil lines are no longer required.	AR27.55-P-0600LW
22	In the XENTRY Portal Parts Information in DG 99, check if the fan unit installed in accordance with the vehicle equipment can be used for retrofitting the trailer hitch.	Model 253.9 with engine 274.9, 276.8, 651 If the fan unit is incompatible, ↓ replace fan unit.
		The removed fan unit is no longer required.	AR20.40-P-5050RF
23	Cut radiator shutters wiring harness branch-off line at a distance of approx. 2 cm from black 4-pin coupling.	Model 253.9 with code 2U1 (Radiator shutters)
24	Insulate line ends of radiator shutters wiring harness branch-off line with solder terminal sleeves and strap down.	Model 253.9 with code 2U1 (Radiator shutters)
		Note color coding of the lines. Insulate differently colored lines separately.	AR00.19-P-0100A
25	In the XENTRY Portal Parts Information in DG 99, check if the fan unit wiring harness installed in accordance with the vehicle equipment can be used for retrofitting the trailer hitch.	If the fan unit wiring harness is incompatible, ↓ remove fan unit wiring harness. The removed fan unit wiring harness is no longer required.
26	Remove battery.	If the fan unit wiring harness is incompatible.
			AR54.10-P-0005LW
27	Remove windshield wiper system.	If the fan unit wiring harness is incompatible.
			AR82.30-P-6400LW
	Install
28	Retrofit mechanical detachable parts.		AN31.11-P-8080-05LWG
		Bolt, longitudinal member reinforcement for trailer hitch (long) to body	*BA31.11-P-1003-01M
		Bolt, trailer hitch to longitudinal member reinforcement (short)	*BA31.11-P-1001-01M
		Longitudinal member reinforcement for trailer hitch (short) to body	*BA31.11-P-1002-01M
29	Install rear engine compartment lining.	If the rear engine compartment lining is incompatible.	AN31.11-P-8080-11LWG
30	Retrofit trailer hitch control unit.		AN31.19-P-8080-05LWG
31	Retrofit trailer hitch wiring harness.		AN31.19-P-8100-05LWG
Notice	Notes on the use of paint scraping nuts on ground connections		AH00.19-P-1000-20A
		Right rear wheel well ground point	*BA00.19-P-1005-01E
		Left front footwell ground point	*BA00.19-P-1016-01E
		Left front footwell ground point (CAN)	*BA00.19-P-1017-01E
		Left footwell ground point	*BA00.19-P-1028-01E
32	Install fan unit wiring harness.	If the fan unit wiring harness is incompatible.	AN31.19-P-8100-07LWG
		Left front ground point	*BA00.19-P-1003-01E
		Nut, positive line to engine compartment prefuse box	*BA54.15-P-1003-01K
		New passenger car wiring harness repair kit	Fig 2
		Wiring harness repair kit, basic	Fig 1
33	Add bumper cutout.	Model 253.9 with code 772 (AMG styling - front spoiler, longitudinal members)	AN31.11-P-8080-02LWG
34	Modify lower bumper section.	Model 253.9 with code 772 (AMG styling - front spoiler, longitudinal members)
35	Install rear switch module upper sensor on rear bumper (70).	Model with code P17 (KEYLESS-GO Package)
			AR80.61-P-0012LW
36	Install rear bumper (70).
			AR88.20-P-2200LWG
37	Mount reinforcement (70.3) onto rear bumper (70) and fix in place using expansion rivet (70.4) and screw (70.5).
38	Install rear switch module lower sensor (A87/2) on rear bumper (70).	Model 253.9 with code P17 (KEYLESS-GO Package)
			AR80.61-P-0012LW
39	Install remaining parts.
40	Attach adhesive label for tongue weight.
	Update Vehicle Documentation (VeDoc)
41	Enter special equipment into online vehicle data card.	Code 550 (Trailer hitch)  Model 253.9 with code 2U1 (Radiator shutters) Code 2U1 (Radiator shutters)
42	Attach "Trailer hitch retrofitted as per AN31.10-P-8080LWG" note under field organization texts to DG 27, DG 31, DG 50, DG 52, DG 54 and DG 88.
43	Connect diagnostic system and select vehicle using vehicle identification number (VIN).
			AD00.00-P-2000-04B
44	Perform variant coding using the software calibration number (SCN).	Central gateway in electronic ignition lock control unit  Trailer recognition control unit  Instrument cluster  Front SAM control unit  Rear SAM control unit  Head unit  Model 253.9 with code 501 (360° camera) 360° camera control unit
45	Disconnect diagnostic system.
			AD00.00-P-2000-04B
	Check
46	Perform function test of ball neck and light signals on trailer hitch socket.		AN31.10-P-0008-01LWG

Fig 1: Identifying Wiring Harness Repair Kit, Basic (000 589 13 99 00)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying New Passenger Car Wiring Harness Repair Kit (220 589 04 99 00)

Courtesy of MERCEDES-BENZ USA