The parking disks are compulsory (you need to indicate your arriving time) and is available at the police, at a petrol station and at the Tourist Office of Morges.
In town: 30 to 60 km/h (18 to 37 mph)
Out of town: 70 to 80 km/h (44 to 50 mph)
Motorways: 100 to 120 km/h (62 to 75 mph)
It is compulsory to wear seat belts both in the front and back of the vehicle.
You need to have a motorway disc to drive on motorways in Switzerland. It is available at post offices and petrol stations and allows you to drive free of charge on motorways until 13st January of the following year.