Retrofit trailer hitch

AN31.10-S-8080EC

Retrofit trailer hitch

19.08.2020

Model

447.6

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

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

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

2.1

Remove vehicle tool kit mount (3).

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



AR68.30-S-5020E

2.2

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)



AR68.30-S-1180E

 Only remove the lower load compartment paneling.

3

Remove rear bumper.



AR88.20-S-2200E

4

Remove towing eye from rear crossmember.



Model 447.6

AR64.20-S-1203E

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

5

Remove rear roof lining.



Model 447.6 with code VD2 (Standard headliner, B-D pillar)

AR68.30-S-7618E

6

Remove right A-pillar trim.



AR68.30-S-4050E

7

Remove front roof lining.



Model 447.6 with code SH9 (Window airbag for driver and front passenger)

AR68.30-S-7607E

8

Remove right cover below the instrument panel.



Model 447.6 with code LC7 (Front footwell illumination)

AR68.10-S-1520E

9.1

Remove glove compartment.

Model 447.6 with code F66 (Glove compartment, lockable)



AR68.10-S-1400E

9.2

Remove stowage compartment.

Model 447.6 except code F66 (Glove compartment, lockable)



AR68.10-S-1610E



Install

10

Retrofit trailer hitch preinstallation electrical wiring harness.



Assignment of right footwell firewall fuse and relay module

GF54.15-S-1256-39TRA

Model 447.6## 1#

AN31.19-S-8100-04EA

Model 447.6## 2#

AN31.19-S-8100-04EC

 Long wedge

*115589035900

11.1

Install glove compartment.

Model 447.6 with code F66 (Glove compartment, lockable)



AR68.10-S-1400E

11.2

Install stowage compartment.

Model 447.6 except code F66 (Glove compartment, lockable)



AR68.10-S-1610E

12

Install right cover below the instrument panel.



Model 447.6 with code LC7 (Front footwell illumination)

AR68.10-S-1520E

13

Install front roof lining.



Model 447.6 with code SH9 (Window airbag for driver and front passenger)

AR68.30-S-7607E

14

Install right A-pillar trim.



AR68.30-S-4050E

15

Install rear roof lining.



Model 447.6 with code VD2 (Standard headliner, B-D pillar)

AR68.30-S-7618E

16

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

17

Install trailer hitch crossmember with coupling ball.

AN31.11-S-8080-04E

 Screw/bolt, trailer hitch crossmember to longitudinal member

*BA31.10-N-1001-01J

18

Make bumper cutout retroactively.

AN31.11-S-8080-08E

 Commercially available devices/tools
Body saw

19

Install rear bumper.



AR88.20-S-2200E

20

Install rear right load compartment trim.



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).

21.1

Install vehicle tool kit mount (3).

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



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.

21.2

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

Model 447.6 except code E28 (Additional battery for retrofitted consumers) except code RR6 (Spare wheel with vehicle jack) 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.

22

Install cap of vehicle tool kit mount (3).

Model 447.6 except code E28 (Additional battery for retrofitted consumers) except code RR6 (Spare wheel with vehicle jack) except code Y36 (Vehicle jack)
Only when retrofitting the trailer hitch with removable ball head.

23

Attach ground line of on-board electrical system battery.



AR54.10-S-0003E

24

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).

25

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.

26

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.

27

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



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

28

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.

29

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



Model 447.6 with code EZ5 (Parking package) Model 447.6 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.

30

Perform SCN coding at reversing camera (RFK) control unit (B84/3) or rear-end door reversing camera (RFK) control unit (B84/10).



Model 447.6 with code FR8 (Reversing camera)

AR54.21-S-0015E

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



Check

31

Perform function check on trailer socket.

AN31.19-S-8100-06E



000 588 00 63 00 Test box

WS82.00-P-0027B

Convert radiator

32

Remove radiator installed as standard and replace with a more efficient one.



Model 447.6 with engine 622.9 with code HH4 (THERMOTRONIC automatic air conditioning) Model 447.6 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

33

Remove standard-equipment electric fan and replace it with a higher-performance electric fan.



Model 447.6 with engine 622 with code HH4 (THERMOTRONIC automatic air conditioning) Model 447.6 with engine 622 with code HH9 (Semi-automatically controlled A/C, TEMPMATIC)

AR20.40-S-5000EF



Model 447.6 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 447.6 with engine 651 with code HH4 (THERMOTRONIC automatic air conditioning) except code H09 (Air conditioning with increased output) Model 447.6 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 447.6 with engine 622 with code HH4 (THERMOTRONIC automatic climate control) or with code HH9 (TEMPMATIC semi-automatic climate control)) model 447.6 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 447.6 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

Parts ordering note

Part no.

Designation

Quantity

KG99

Trailer hitch package contents

1