Westfalia Tow Bar Installation Guide for Mercedes-Benz Viano/Vito (2014-)

Product Overview

This guide details the installation and usage of the Westfalia tow bar, part number 313 435 600 001, specifically designed for Mercedes-Benz Viano and Vito vehicles manufactured from 2014 onwards.

Important Safety Information and General Instructions

Please read and understand all instructions before installation.

• National guidelines concerning the approval of mounted accessories must be observed.
• Any alteration or modification of the tow bar is prohibited and will void the operating license.
• Ensure any insulating compound or underbody coating is removed from the vehicle's contact surfaces where the tow bar is to be mounted.
• The tow bar is intended for towing trailers and for carrying loads. Any other use is prohibited.
• If your vehicle is equipped with a parking system, malfunctions may occur after installation if parts of the tow bar are within the sensor's range. Adjust the sensing range or disable the parking system if necessary. This is less likely with removable or pivoting ball tow bars when they are not in the operating position.
• The tow bar is a safety-critical component and must only be fitted by qualified companies. Improper assembly can result in a serious accident hazard.
• The German text of this instruction is binding.
• Subject to change without notice.

For complaints, please contact your contract partner directly and quote the charge number found on the type plate. Your complaint cannot be processed without this information.

Installation Procedure

The following steps outline the installation process. Refer to the diagrams for visual guidance.

Step 1: Preparation

Access the rear of the vehicle. Ensure the mounting areas on the vehicle chassis are clear of any obstructions, insulation, or underbody protection.

Step 2: Mounting Brackets

Attach the mounting brackets (typically labeled '3' in diagrams) to the vehicle's chassis. Use the specified fasteners, such as M12x1.5x90 bolts, ensuring they are securely tightened.

Step 3: Attaching the Tow Bar Assembly

Position the main tow bar assembly (typically labeled '1') onto the mounted brackets. Align the holes and insert the appropriate bolts, such as M12x80, with washers (e.g., 13x24x2.5).

Step 4: Securing the Assembly

Tighten all bolts securely. Specific torque values are provided: M12 bolts should be torqued to 95 ± 5 Nm.

Step 5: Installing the Tow Ball

Attach the tow ball assembly (typically labeled '2' and '4') to the tow bar receiver. Secure it using the provided hardware, ensuring it is properly locked in place.

Step 6: Electrical Connection (Implied)

While not explicitly detailed with text in the diagrams, the installation typically involves connecting the vehicle's electrical harness to the tow bar's socket.

Step 7: Clearance and Weight Checks

Ensure that the required clearance (Freiraum) is maintained as per ECE-R 55 regulations (Annex 7, Figures 25a and 25b). This involves specific angular and dimensional clearances around the tow bar and vehicle.

Adhere to the vehicle's permissible gross weight and towing capacity limits. Consult the vehicle's manual for specific details.

Step 8: Final Checks

Perform an initial check at 0km and a follow-up check at 1000km to ensure all components remain secure and properly functioning.

Declaration of Correct Installation

This section is for the installer to complete, declaring that the tow bar has been installed correctly according to the manufacturer's instructions and vehicle specifications.