Trailer coupling socket wiring harness, removal and installation

AR31.19-P-1400LWH

Trailer coupling socket wiring harness, removal and installation

22.11.2019

Model

253.3/9

with code 460 (Canada version)

with code 550 (Trailer coupling)

Model

253.3/9

with code 494 (US version)

with code 550 (Trailer coupling)

Model

253.3/9

with code 550 (Trailer coupling)

with code 737L (Mexico)

1

Crossmember

3

Black 8-pin coupling

20

Trailer hitch wiring harness

20.3

Grommet

X58/11

Trailer socket (7-pin)

20

Trailer hitch wiring harness

20.1

Black 22-pin coupling

N28/1

Trailer recognition control unit

X58/33

Vehicle interior/trailer hitch electrical connector

 Danger

Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)

Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines.

AS00.00-Z-0035-01A

 Warning

Risk of injury caused by fingers being jammed or pinched when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof.

No parts of the body or limbs should be within the operating area when the components are moving.

AS00.00-Z-0011-01A

Topical note

General information on handling vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system

AH00.00-Z-0300-01A

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Notes on HANDS-FREE ACCESS

Model 253.3/9
with code 460 (Canada version)
with code 550 (Trailer coupling)
with code 871 (Sensor system for trunk lid opening/closing)
with code 889 (KEYLESS-GO)
Model 253.3/9
with code 494 (US version)
with code 550 (Trailer coupling)
with code 871 (Sensor system for trunk lid opening/closing)
with code 889 (KEYLESS-GO)
Model 253.3/9
with code 550 (Trailer coupling)
with code 737L (Mexico)
with code 871 (Sensor system for trunk lid opening/closing)
with code 889 (KEYLESS-GO)

AH80.61-P-0001-01A

 

Remove/install

1

Fold up load compartment floor and secure against unintended folding down

2

Fold load compartment well trim to one side

3

Disconnect black 22-pin connector (20.1) at trailer recognition control unit (N28/1)

4

Disconnect vehicle interior/trailer hitch electrical connector (X58/33)

5

Raise vehicle

AR00.60-P-1002LWG

6

Detach trailer hitch wiring harness (20) from crossmember (1)

7

Detach grommet (20.3) from rear center section

8

Guide trailer hitch wiring harness (20) and grommet (20.3) through opening in rear center section to outside

9

Release black 8-pin connector (3) at 7-pin trailer socket (X58/11) (arrow) and disconnect

10

Remove trailer hitch wiring harness (20)

11

Install in the reverse order



Check

12

Perform function check of light signals at 7-pin trailer socket (X58/11)



AN31.10-P-0008-01LWG