Westfalia Detachable Tow Bar Installation and Operating Manual

Product Information

Part Number: 303 352 600 001

Approval: E13 55R-01 3484

Type: 303 352, Class A50-X

D-Value: 10.0 kN

Max. Vertical Load: 75 kg

Applicable Models: BMW 3 Series (F30/F31) 2012-, 4 Series Coupé (F32) 2013-, Cabrio (F33) 2014-, Gran Coupé (F36) 2014-

General Instructions and Safety Warnings

• National guidelines concerning approval of auxiliaries must be observed.
• Any alteration or modification of the towing hitch is prohibited and voids the operating license.
• Remove insulating compound and underbody coating from the vehicle in the area of the contact surface of the trailer hitch.
• The trailer hitch is intended for towing trailers and for attaching devices for carrying loads. Any other use is prohibited.
• Vehicles equipped with parking assist systems may experience malfunctions if parts of the tow bar are in the sensor range. Adjust the sensing range or disable the parking assist system if necessary. This is less likely with removable or pivoting ball tow bars when the ball is not in the operating position.
• The trailer hitch is a safety-critical part and must be fitted only by qualified companies. Improper assembly may result in a serious accident hazard. The German text of this instruction is binding.
• For complaints, contact your contract partner directly and provide the charge number found on the type plate.
• Subject to change.

Technical Specifications and Clearances

ECE-R 55 Regulations: Clearance must be provided according to Appendix 7, Figures 25a and 25b of the ECE-R 55 regulations.

Diagrams illustrate required clearances and angles.

Vehicle Weight Considerations:

• Maximum load for bicycle carriers: 60 kg (total), 30 kg (per carrier).
• Maximum vertical load (S): 75 kg.

D-Value Calculation: The maximum towing capacity of the tow bar is determined by the D-value, calculated based on the vehicle's gross weight (T) and the trailer's maximum towing weight (C). D = (T x C) / (T + C) x 0.00981.

Operating Instructions for the Detachable Ball Bar

Pre-Journey Checks:

• ✔️ Green marking on handwheel aligned with green marking on ball bar.
• ✔️ Handwheel rests against ball bar (no gap).
• ✔️ Lock is closed and key is withdrawn. Handwheel cannot be pulled out.
• ✔️ Ball bar is fully inserted into the receiver and tight. Check by shaking.

If any check fails, repeat installation or do not use the device. Contact manufacturer.

Installation:

• Remove the plug from the receiver.
• Ensure the ball bar is in the unlocked position (5mm gap, red mark on handwheel aligned with green on ball bar).
• If the locking mechanism is engaged, pre-tension it: insert key, open lock, pull handwheel in direction 'a' [arrow pointing right], turn in direction 'b' [arrow pointing right] to stop.
• Insert the ball bar into the receiver with the stop pin and push upwards. Locking occurs automatically.
• Keep hands away from the handwheel during locking.
• Close the lock, remove the key, and press the cover onto the lock.

Removal:

• Pull cover off lock, press onto key handle. Open lock with key ?.
• Hold ball bar, extract handwheel in direction 'a' [arrow pointing right], turn in direction 'b' [arrow pointing right] to unlock.
• Remove ball bar from receiver.
• Release handwheel; it will automatically engage in the unlocked position.
• Store ball bar safely in the boot, protected from dirt.
• Insert the plug into the receiver.

Notes:

• Repairs and dismantling must be carried out only by the manufacturer.
• Attach the provided warning label in a visible location near the receiver or inside the boot.
• Keep the ball bar and receiver clean for proper operation.
• Regular maintenance of mechanical parts is required. Treat the lock only with graphite.
• Lubricate bearing points, friction surfaces, and balls with resin-free grease or oil for corrosion protection.
• Remove the ball bar and insert the plug before cleaning the vehicle with a steam cleaner. Do not steam clean the ball bar.

Important:

• The detachable ball bar comes with 2 keys. Note the key number ???? for future orders.

Diagram Descriptions

Diagrams throughout the document illustrate components, installation steps, and operational states of the detachable ball bar. These include detailed views of the mechanism, clearance requirements, and vehicle-specific fitting information.