I took my Up! for its first service today. We've had no problems with it at all (besides the idiot clipping the mirror off). I was surprised to receive a phonecall from them saying that I'd need to bring it back in as the heat shield had 'broken' and they were ordering the part for it. It's still covered under warranty so no problem there. When I got there I asked more questions about it and discovered they've been having this problem with heat shields on the Up!s and is something they keep an eye out for and repair them as quickly as possible. They said it isn't a 'break' it is corrosion to the centre of it by the exhaust. The Up! is not even a year old yet and done 5000 miles, I couldn't believe it! On inspection there is a little corrosion to it. It's something to keep an eye on with yours!!