Tow-Trust Towbars

Issue 2

TM14 MERCEDES C-CLASS 2014>

This document provides installation instructions for the Tow-Trust TM14 towbar system for Mercedes C-Class vehicles (2014 onwards).

Parts List:

The main assembly diagram visually represents these parts, showing how the crossmember (A) connects to the chassis via side arms (B), with the extension (C) and spacer tube (L) also integrated. Various fasteners (E, J, F, K, M, G, H, D) are depicted with dashed lines indicating their attachment points and quantities, such as "4 x J" for four flat washers.

BUMPER REMOVAL:

1. Remove the boot interior trim.
2. Remove the rear light clusters, noting three fixings inside the vehicle.
3. Remove seven fixings along the lower edge, three fixings securing each wheel arch liner, two fixings behind each wheel arch liner, and one tip fixing on either side.
4. Remove four fixings through the rear panel inside the vehicle.
5. Release the bumper from the vehicle, starting at the bumper tips and moving rearward. Ensure any wiring looms are disconnected.
6. FIG 1 Reference: If fitted, drill rivets and remove the inner plastic insert from the bumper lower edge. This insert is not refitted with the Towbar assembly.
7. FIG 2 Reference: For AMG Style bumpers only, cut the lower valance. Alternatively, order a lower pre-cut valance from Mercedes. Exercise caution to avoid cutting into the wiring loom running through the bumper.
8. Remove the two vertical fixings securing the tank from the O/S (Offside) and remove the rear impact beam from the rear panel. The impact beam is not refitted with the Towbar assembly.

TOWBAR INSTALLATION:

1. Using Item E with Item J, fix Item A (Crossmember) to the rear panel. Ensure original gaskets are between Item A and the rear panel. It is also advised to add adequate sealant around the Towbar and rear panel joints to prevent water ingress.
2. Insert Items B (Handed Side Arms) through the Towbar end plates and secure them to the inside face of each chassis member using Items E and Items J.
3. Using Items F and Item K, fix Items B to Item A.
4. Using Item M, fix the tank back to Item A.
5. Using Item G with Item K and Item H with Item K, fix Item C (Extension) to Item A, ensuring Item L (Spacer Tube) is fitted at the lowest fixing point.
6. Using Item D, fix your desired ball bracket and wiring plate (not supplied in this kit) to Item C.
7. Fully tighten all fixings, ensuring the Towbar is rigid, square, and secure.
8. Refit the rear bumper, light clusters, and boot interior trim.

Notes:

1. Recommended Torque Setting for M12 Grade 10.9: 139 Nm. (For other Torque Settings, see notes overleaf.)
2. Nose load limits and vehicle manufacturers' trailer / caravan weight limits must be observed.