Citroën is promoting its new service of selling and buying used autos with the help of a new ad featuring the most popular “star” of the recent news — Icelandic volcano Eyjafjallajökull. The main idea is that if you buy a car, which has already been owned by someone, its technical condition can be bad. Still, Citroën Select, the new program, guarantees that any vehicle from its venue is always worth the money you pay for it.