If you want to be on the fast track with your trailer you should get a 100 km/h authorisation for your combination. In this case you can go 100 km/h instead of only 80 km/h on the motor road or highway. You can have your trailer checked to know if it fulfils the conditions for this. With the confirmation you get the required 100 km/h plaque from your responsible authorities.

These 100 km/h speed regulations are valid for:

• cars and
• other multitrack vehicles (e.g. caravans) with a permissible total weight of up to 3.5 t

The technical requirements are:

• your car is equipped with ABS
• the trailer is suitable for a maximum speed of 100 km/h
• the trailer tyres are equipped for 120 km/h and have at least the speed index L
• the tyres are younger than six years

In addition to that, certain mass proportions between trailer and towing vehicle must be observed. The permissible total weight of the 100 km/h trailer depends on the empty weight of the towing vehicle. You can find the multiplying factor X for the empty weight in the following table:

Technical equipment of the trailer:

• without hydraulic shock absorbers: 0.3
• with brakes and hydraulic shock absorbers: 1.1 or 1.2*

All braked trailers (except for caravans) have to meet further conditions:

• the permissible total weight of the trailer must not exceed the towing capacity of the towing vehicle
• the permissible total weight of the trailer must not exceed the permissible total weight of the towing vehicle

The factors with an attached “ * “ may be made use of if:

• the trailer is equipped with a suitable coupling with a stabilising device or
• the trailer is equipped with a suitable dynamic stabilisation system or
• the towing vehicle is equipped with a suitable dynamic stabilisation system for trailer use (confirmed in the registration certificate)

Examples for calculation:

Factor X = 0.3 (unbraked trailer)
Empty weight of the trailer: 1800 kg
1800 kg x 0.3 = 540 kg (max. permissible total weight of the trailer)

Factor X = 1.1 (braked trailer)
Empty weight of the towing vehicle: 1800 kg
1800 kg x 1.1 = 1980 kg (max. permissible total weight of the trailer)