What must you check when transporting bicycles on a rear-mounted support system?

When transporting bicycles on a rear-mounted support system, it is essential to ensure that all aspects are properly checked to comply with German traffic regulations.

1. The system must be appropriate for the vehicle according to the manufacturer's instructions. This is crucial to ensure that the bicycles are securely supported and that the vehicle’s performance is not adversely affected.

2. It is vital to securely fix both the support system and the bicycles. This prevents any movement during transit, which could lead to accidents or damage.

3. Checking that the lighting equipment and number plate are not covered is important for safety and legality. If these are obscured, it can pose a hazard as other road users might not see the vehicle clearly.

By considering all three points, you ensure that both safety and compliance with traffic rules are maintained, thereby reducing the risk of accidents and legal issues while driving.