Westfalia Tow Bar 305 301 Installation and Operation Manual for Audi A4 (B7)

General Information and Warnings

Brand: Westfalia

Model: 305 301

Vehicle Compatibility: Audi A4 (B7) Chassis codes B7 8E, 8H.

Technical Specifications:

• Approval Number: e13*94/20*00*1862
• D-Value: 10.41 kN
• Vertical Load (S): 100 kg
• Coupling Class: A 50-X
• Towing Capacity: Refer to vehicle registration document.
• The D-value is calculated based on the formula D = (T x C) / (T + C) x 0.00981, where T is the maximum gross vehicle weight and C is the maximum towing capacity of the towing vehicle.

Important Notes:

• Always observe national guidelines concerning official approval of extensions.
• Any alteration or conversion of the tow bar is prohibited and will result in the cancellation of the type approval.
• Remove insulating compound and/or underseal from the vehicle's mating surfaces where the tow bar will be attached.
• The tow bar is designed for towing trailers with ball couplings and for use with load-bearing implements approved for attachment to the tow bar. Any other use is prohibited.
• Vehicles equipped with a Parking Distance Control (PDC) system may experience malfunctions after tow bar installation if parts of the tow bar are within the sensor detection area. In such cases, the detection area should be readjusted or the PDC deactivated. Malfunctions are not expected with detachable or pivoted ball bars if the ball bar is removed from its operating position.
• Modifications are subject to change.

Installation Steps

The following steps detail the installation process. Ensure all parts are present before beginning.

1. Step 1: Accessing the Trunk

   Shows the rear of an Audi A4 with arrows indicating access to the trunk. Components like a spare tire and trunk floor cover are depicted for removal to access mounting points.

2. Step 2: Accessing Mounting Points

   Illustrates folding down the rear seats to access the vehicle's chassis. Close-up views highlight the specific mounting points on the vehicle's chassis where the tow bar will be attached.

3. Step 3: Bumper Removal

   Depicts the removal of the rear bumper cover. Arrows indicate how to detach the bumper to gain access to the tow bar mounting area.

4. Step 4: Positioning the Tow Bar Bracket

   Shows the main tow bar bracket being positioned and aligned with the vehicle's chassis mounting holes.

5. Step 5: Bumper Modification

   Illustrates measurements for modifying the bumper, with dimensions like 140mm and 290mm, and angles indicating where cuts might be needed for clearance.

6. Step 6: Attaching the Tow Bar Assembly

   Shows the tow bar assembly being attached to the vehicle's frame, connecting to the previously identified mounting points.

7. Step 7: Securing the Tow Bar

   Details the fastening of the tow bar to the chassis using M8 bolts and specific washers (e.g., 8,4x12,5x1,6), with a torque specification of 20 Nm indicated.

8. Step 8: Re-installing Bumper Support

   Shows the re-installation of the bumper support structure onto the vehicle's chassis.

9. Step 9: Securing the Main Tow Bar Arm

   Illustrates the main tow bar arm being attached to the vehicle frame using M10x105 bolts, with a torque specification of 55 Nm.

10. Step 10: Re-installing the Bumper

    Depicts the rear bumper cover being re-attached to the vehicle after the tow bar installation.

11. Step 11: Re-installing Trunk Components

    Shows the trunk area again, with arrows indicating the re-installation of the spare tire and trunk floor cover.

12. Step 12: Attaching the Ball Mount

    Illustrates the final attachment of the tow ball assembly (the ball hitch) to the tow bar bracket. It specifies using M12x80 bolts and a torque setting of 95 Nm.

Clearance and Weight Requirements

This section details the required clearance around the tow bar according to European Directive 94/20/EC, Appendix VII, Diagram 30. It includes diagrams showing maximum angles (e.g., 45°, 30°) and minimum distances (e.g., 32mm, 55mm, 140mm, 75mm) that must be maintained. It also lists specifications related to the vehicle's gross weight rating and towing capacity.

Declaration of Correct Installation

This section includes a declaration for the installer to complete, confirming that the tow bar type (305 301) has been installed correctly according to the manufacturer's specifications and vehicle attachment points. It also states that the vehicle user has been informed about the use and maintenance of the tow bar.