Rubber seals (weatherstrips)Rubber seals (weatherstrips)  - Care of exterior - General maintenance - Audi A5 Owner's Manual - Audi A5

The weatherstrips will remain pliable and last longer if they are occasionally treated with a suitable care product (for example silicone spray). This will also prevent premature ageing and leaks. The doors will be easier to open as well. If they are kept pliable, the door seals will be less likely to freeze up in the winter.