(Retrofit Mechanical Detachable Parts For Fully Electric Swiveling Trailer Hitch - AN31.11-P-0010-04LWH)

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Model 253.3 up to 5/31/19

MODIFICATION NOTES

14.10.2019

Bolt, trailer hitch to longitudinal member reinforcement (short)

BA31.11-P-1001-01M

TRAILER COUPLING MECHANISM

Number	Designation			Model 253
BA31.11-P-1001-01M	Bolt, trailer hitch to longitudinal member reinforcement (short)	M12	Nm	120

TRAILER COUPLING MECHANISM

Number	Designation			Model 253
BA31.11-P-1002-01M	Longitudinal member reinforcement for trailer hitch (short) to body	Nut M12	Nm	120
BA31.11-P-1002-01M		Bolt M12	Nm	125

TRAILER COUPLING MECHANISM

Number	Designation			Model 253
BA31.11-P-1003-01M	Bolt, longitudinal member reinforcement for trailer hitch (long) to body	M10	Nm	70

REPAIR MATERIALS

Number	Designation	Order number
BR00.45-Z-1028-04A	Assembly cleaner	A 000 986 56 01

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Remove adhesive residue from the seals (arrows).
Use assembly cleaner.

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Model 253.3 up to 5/31/19
with code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in))

Insert longitudinal member reinforcement (6) into left longitudinal frame member.
Model 253.3 up to 5/31/19
with code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in))

Screw in screws/bolts (4) finger-tight.

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Model 253.3 up to 5/31/19
with code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in))

Insert longitudinal member reinforcement (7) into right longitudinal frame member.
Model 253.3 up to 5/31/19
with code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in))

Screw in screws/bolts (4) finger-tight.

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Remove stop plug (8) from rear center section.
The stop plug (8) is no longer required.
Insert left longitudinal member reinforcement (2) into left longitudinal frame member.
Insert right longitudinal member reinforcement (3) into right longitudinal frame member.

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Screw on screw/bolt (5) of right longitudinal member reinforcement (3) finger-tight.
Screw on screw/bolt (5) of left longitudinal member reinforcement (2) finger-tight.

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Tighten nuts (15) finger-tight.

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Position trailer hitch crossmember (1) onto left and right longitudinal member reinforcements (2 and 3) and screw on screws/bolts (13) finger-tight.
Aid of helper required.
Align trailer hitch.

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The sequence of operation steps described below must strictly be observed.

In order to ensure that the trailer hitch is seated correctly.
Model 253.3 up to 5/31/19
with code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in))

Tighten screws/bolts (4) to specified torque .

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Model 253.3 up to 5/31/19
with code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in))

Tighten screws/bolts (4) to specified torque .

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Tighten nuts (15) to specified torque .

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Tighten screws/bolts (5) to specified torque .

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Tighten bolts (13) at left and right to torque .
Guide trailer hitch wiring harness (20) through rear center section into vehicle interior and fit grommet provided.

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