Retrofit trailer hitch

AN31.10-S-8080EA

Retrofit trailer hitch

16.07.2019

Model

447.8

except code 771L (Argentina version)

except code 775L (Brazil version)

except code 777L (Chile version)

except code E57 (Electrics for 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

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

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).

3

Remove jack.

Model 447.8 with code RR6 (Spare wheel with vehicle jack) Model 447.8 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 447.8 except code E65 (Burmester surround sound system) except code RR6 (Spare wheel with vehicle jack) except code SB6 (Comfort front passenger seat, swiveling) except code W68 (Electrically operated liftgate) except code Y36 (Vehicle jack) except code ZG2 (Permanent all-wheel drive) except code ZK7 (MARCO POLO equipment line)



AR68.00-S-0009E

 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 side trim in rear passenger compartment.

Model 447.8 with code ZK7 (MARCO POLO equipment line) except code RR6 (Spare wheel with vehicle jack) except code Y36 (Vehicle jack)



AR68.30-S-1207E

5

Remove rear bumper.



AR88.20-S-2200E

6

Remove carrier for rear bumper.



Model 447.8 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 447.8

AR64.20-S-1203E

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

8

Remove door sill from sliding door.



AR68.30-S-1312E

9

Remove lower B-pillar trim at right.



AR68.30-S-4700E

10

Remove door sill on front passenger side.



AR68.30-S-4100E

11

Remove trim in right footwell.



AR68.30-S-4030E

12

Remove right cover below the instrument panel.



AR68.10-S-1520E

13

Remove glove compartment.



Model 447.8 with code F66 (Glove compartment, lockable)

AR68.10-S-1400E



Install

14

Retrofit trailer hitch preinstallation electrical wiring harness.



Assignment of right footwell firewall fuse and relay module

GF54.15-S-1256-39TRA

Model 447.8## 1#

AN31.19-S-8100-04E

Model 447.8## 2#

AN31.19-S-8100-04EB

 Long wedge

*115589035900

15

Install glove compartment.



Model 447.8 with code F66 (Glove compartment, lockable)

AR68.10-S-1400E

16

Install right cover below the instrument panel.



AR68.10-S-1520E

17

Install trim in right footwell.



AR68.30-S-4030E

18

Install front passenger side door sill.



AR68.30-S-4100E

19

Install lower B-pillar trim at right.



AR68.30-S-4700E

20

Install door sill on sliding door.



AR68.30-S-1312E

21

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

22

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

23

Make bumper cutout retroactively.

AN31.11-S-8080-08E

 Commercially available devices/tools
Body saw

24

Install rear bumper.



AR88.20-S-2200E

25

Install vehicle tool kit mount (3).

 Use the vehicle tool kit mount (3) provided in the parts kit.
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.

26

Install jack.

Model 447.8 with code RR6 (Spare wheel with vehicle jack) Model 447.8 with code Y36 (Vehicle jack)

27

Install cap of vehicle tool kit mount (3).

28

Install rear right side trim in rear passenger compartment.



AR68.30-S-4780E

29

Install stowage compartment cover (1).

30

Attach ground line of on-board electrical system battery.



AR54.10-S-0003E

31

Supplement special equipment in Vehicle Documentation (VeDoc).

 Designation of relevant special equipment: Code Q50 (Trailer hitch with removable ball head).

32

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.

33

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.

34

Perform SCN coding on radio (Audio/COMAND) (N87/6).



AR54.21-S-0015E

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

 Do not yet remove vehicle diagnosis system.

35

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.

36

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



Model 447.8 with code EZ5 (Parking package) Model 447.8 with code EZ6 (Parking package with 360° camera) Model 447.8 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.

37

Perform SCN coding on gateway for user interface CAN (N93/4).



AR54.21-S-0015E

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

 Do not yet remove vehicle diagnosis system.

38

Perform SCN coding on reversing camera (RFK) control unit (B84/5) or 360° camera control unit (N153).



Model 447.8 with code EZ6 (Park package with 360° camera) Model 447.8 with code FR8 (Reversing camera) Model 447.8 with code JS1 (360° camera)

AR54.21-S-0015E

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



Check

39

Perform function check on trailer socket.

AN31.19-S-8100-06E



000 588 00 63 00 Test box

WS82.00-P-0027B

Convert electric fan

40

Remove standard-equipment electric fan and replace it with a 850 W electric fan.



Model 447.8 with engine 651 except code H09 (Air conditioning with increased output)

AR20.40-S-5000E

 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