im not sure this would be such a good idea. my mate has just had to rebuild his engine in his audi S3 as it went bang big time. he took it back to the garage he bought it from who refused to look after him so he got in an independant assessor who`s engineer said the cause was the turbo actuator had been changed which had destroyed the engine. its in the courts now to see how much the garage will pay him, though they say it wasnt them that actually changed anything but the previous owner.