In addition, leather is sensitive to sun exposure. If your car has leather seats and you plan to leave it in the sun for a long time, cover the seats as they may fade.
To clean leather upholstery, lightly dampen a cotton or woolen cloth with water and wipe the dirty areas. For heavy dirt, you can use a mild soap solution. The following soap solution composition is recommended: two tablespoons of neutral soap or mild detergent per sheet of water. When cleaning, make sure that the leather does not become saturated with water, and that water does not leak through the seams. Gently treat greasy and oily stains with dry cleaning gasoline, but do not rub them. Then wipe the leather with a dry soft cloth.
Regular care involves treatment once every six months with a skin care product. To meet high demands, there are creams for wrinkles on the skin with jojoba oil, "C1 Lederpflege". C1 will help revive faded skin.
After washing the car, it is recommended to lubricate the door locks with a small amount of all-season oil.

Audi offers a variety of leather trims. To ensure that the leather retains its valuable qualities, clean and care for it regularly.

[A link to the original source is available on the website «AudiManual»]
