Moin, at the 05 STS V8 there is a recall regarding problems with the cat. According to Cadillac this applies up to max. 200.000 km or max. 12 years. On request I was told that my vehicle was built for the US market and is therefore not guaranteed in Europe, but only in the USA. In Europe only vehicles which have been manufactured for the EU market are guaranteed. There are possibilities for a warranty claim, except for rebuke shipping 😉