Retrofit trailer hitch

AN31.10-S-8080ED

Retrofit trailer hitch

13.02.2020

Model

447.6/7

with code E57 (Electrics for trailer socket)

with code XM0 (Facelift)

except code 771L (Argentina version)

except code 775L (Brazil version)

except code 777L (Chile version)

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

3

Vehicle tool kit mount

4

Screw

 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

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 self-locking nuts and bolts

AH00.00-N-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

If the trailer hitch with removable ball head is to be retrofitted,



replace removed vehicle tool kit mount (3) with vehicle tool kit mount (3) from parts kit and dispose of it properly.

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 SB6 (Comfort front passenger seat, swiveling) except code ZG2 (All-wheel drive, permanent)



AR68.00-S-0009E

If the trailer hitch with removable ball head is to be retrofitted,



replace removed stowage compartment in rear passenger compartment at right with vehicle tool kit mount (3) and dispose of it properly.

4.3

Remove rear right load compartment trim.

Model 447.6 except code E28 (Additional battery for retrofitted consumers) except code RR6 (Spare wheel with vehicle jack) except code Y36 (Vehicle jack) 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-4780E

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 is no longer required and can be disposed of properly after removal.

7

Remove towing eye from rear crossmember.



Model 447.6/7

AR64.20-S-1203E

 The towing eye is no longer required and can be disposed of properly after removal.



Install

8

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

9

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

10

Make bumper cutout retroactively.

AN31.11-S-8080-08E

 Commercially available devices/tools
Body saw

11

Install rear bumper.



AR88.20-S-2200E

12.1

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)
When retrofitting a trailer coupling with non-removable ball head.



AR68.30-S-1206E

12.2

Install stowage compartment in right rear passenger compartment.

When retrofitting a trailer coupling with non-removable ball head.



Model 447.7 with code V23 (Interior trim, superior version) except code E28 (Additional battery for retrofitted consumers) except code SB6 (Comfort front passenger seat, swiveling) except code ZG2 (All-wheel drive, permanent)

AR68.00-S-0009E

13

Install rear right load compartment trim.



Model 447.6 except code E28 (Additional battery for retrofitted consumers) except code RR6 (Spare wheel with vehicle jack) except code Y36 (Vehicle jack) 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 for the retrofit installation of the vehicle tool kit mount (3) with an appropriate variant.

14.1

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.

14.2

Retrofit vehicle tool kit mount (3) from parts kit.

All vehicles without existing vehicle tool kit mount (3)
When retrofitting a trailer coupling 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.

15

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)

16

Install cap of vehicle tool kit mount (3).

All vehicles with retrofitted vehicle tool kit mount (3)
When retrofitting a trailer coupling with removable ball head.

17

Install rear right side trim in rear passenger compartment.

When retrofitting a trailer coupling with removable ball head.



Model 447.7 with code V23 (Trim, superior version) with retrofitted vehicle tool kit mount (3)

AR68.30-S-4780E

18

Install stowage compartment cover (1).

Model 447.7 with code V23 (Interior trim, superior version)

19

Attach ground line of on-board electrical system battery.



AR54.10-S-0003E

20

Enter each special equipment item 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).
The existing entry "Code E57 (Electrical system for trailer socket)" must be deleted.

21

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.

22

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.

23

Perform SCN coding on radio (Audio) (N87/2).



Model 447.6/7 with code EN6 (Audio 10) Model 447.6/7 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.

24

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.

25

Perform SCN coding on Parktronic (PTS) control unit (N62).



Model 447.6/7 with code EZ5 (Active Parking Assist with reversing camera) Model 447.6/7 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.

26.1

Perform SCN coding on reversing camera (RFK) control unit (B84/3).

Model 447.6/7 with code FR8 (Reversing camera) with code W65 (Tailgate)



AR54.21-S-0015E

 Under the menu item "Control unit adaptations", follow the instructions for "SCN coding".

26.2

Perform SCN coding on rear-end door reversing camera (RFK) control unit (B84/10).

Model 447.6/7 with code FR8 (Reversing camera) with code W50 (Rear-end door, two-wing, 180 degrees without window) Model 447.6/7 with code FR8 (Reversing camera) with code W54 (Rear-end door, two-wing, 270 degrees)



AR54.21-S-0015E

 Under the menu item "Control unit adaptations", follow the instructions for "SCN coding".



Check

27

Perform function check on trailer socket.

AN31.19-S-8100-06E



000 588 00 63 00 Test box

WS82.00-P-0027B

 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

Parts ordering note

Part no.

Designation

Quantity

KG99

Trailer hitch package contents

1