Has anyone had any experience 'exchanging' your Wett Chip when you buy a new car. I sent them an e-mail to see if they had any policy - this is what I got, I want to see if it is true.<p>'We do have a policy where by if you have a chip for an A4 and then upgrade to an A6 or another A4, you could just exchange chips at no extra cost.'<p>thanks