Notes On Installing A Trailer Hitch - AH31.10-P-1000-02CW
Model 117.3/9, 118, 156.9, 164, 166, 167, 176.0, 177.0/1, 204, 205, 206, 207, 212, 213, 218.9, 222.0/1, 238, 242.8, 243, 246.2, 247, 253, 254, 257.3, 290, 292, 294, 296
Model 163.### 1# Trailer hitch removable
Model 203.### 1# with code 550 (Trailer coupling) except code 772 (AMG styling - Front spoiler, side skirts) Trailer hitch with removable ball neck
Model 209.3## (except 209.376/377) 1# with code 550 (Trailer coupling) except code 772 (AMG styling - Front spoiler, side skirts) except code 950 (AMG sport package)
Model 209.4## (except 209.476/477) 1# with code 550 (Trailer coupling) except code 772 (AMG styling - Front spoiler, side skirts) except code 950 (AMG sport package)
Model 463 as of model year 2019
Export countries must observe the respective registration regulations and legal requirements regarding the installation of a trailer hitch.
Neither body sealant nor underfloor protection should be present at the body contact points of the trailer hitch. The body contact points must not be soiled. Observe the corrosion protection guidelines; where necessary, bare metal areas of the body must be coated with anticorrosion paint.
Trailer hitches are homologated safety-related parts and may only be mounted to vehicles by specialist personnel. Trailer hitches that suffer damage as a result of accident, ground contact or impact are to be replaced. Attempts to repair these components by bending or welding them, or any other mechanical forms of repair, are not approved.
The ball head must have a minimum diameter of 49 mm at all points, measured using a vernier caliper. To reduce the level of wear to the ball, grease the ball head before use. Inform the customer about this.
Safe trailer operation is not assured otherwise.
Before coupling the trailer on trailers with an anti-swerve device, it must be ensured that the ball head is clean and free of grease.
Otherwise, the friction between the friction linings and the ball head is considerably reduced, and the swerving and pitch motions are no longer suppressed.
Also advise the customer that greasing the ball head on trailers with antiswerve devices is not permitted.
Advise the customer to read the chapters Trailer hitch and Trailer operation in the operator's manual.
Model 163, 203, 209
As part of liberalization of EU regulations the legislator waives any requirement for an inspection of retrofitted trailer hitch (AHV) at an authorized technical inspection station (for example Technical Inspection Association).
Prerequisites:
- The additional phrase "if installed at the factory" must be printed in the registration papers (in clause 33 to clause 27: E1 00...).
- An E1-test symbol must be affixed to the trailer hitch.
For older vehicles or trailer hitches, with national test symbol (no E1-test symbol), the installation test at an authorized technical test point (e.g. Technical Inspection Association) continues to apply.
MODEL 163
On vehicles up to model year 2000, the rear bumper must be replaced with a model year bumper.
If a rear bumper is installed on a vehicle as of model year 2000 which does not correspond to the model year 2000, it should be replaced by a rear bumper with code 800 (model year 2000).
MODEL 163
The customer must be advised that fuse 18 in the fuse and relay module (F1) must only be inserted when towing a trailer - an external user could drain the vehicle battery when stationary.
model 203, 209
Always remind the customer that fuse 18 in the SAM control unit with the rear SAM fuse and relay module (N10/2) should be inserted in its socket only when a trailer is actually connected.
Otherwise another electrical device could discharge the battery while the vehicle is at a standstill.