If you are travelling during the winter months (Nov-Apr) it is your responsibility to ensure you have the appropriate tyres fitted to your vehicle, as may be required by law in each country.
Click here for a link to the AA's UK website for more information.
The assembly-line tyres fitted to Citroën/DS vehicles when they leave the factory are multipurpose. This means that they are suitable for varied driving conditions, however this excludes extreme conditions such as the presence of large volumes of snow, ice or water on the road. Unfortunately we cannot have special sculpture tyres such as "snow" or "contact" tyres fitted to our normal range of vehicles.
In the mountain areas, most of the large supermarkets have auto-parts departments, as well as gas stations or auto-parts shops. For example, in France: Norauto, Leclerc Auto, Carrefour Auto. To be sure of the exact fitting, you can also order snow chains from a Citroen dealer.