i have a 2008 Audi A3 2.0 Tdi Sline (140) with 89000 miles. To begin with when i reached 70+mph or sometimes 3000rpm+ it would go into limp mode. When i reached a stop i turned off engine, then started it again, and it was fine, untill next time. had car read and it came back as MAF sensor and also read boost pressure intermittent. changed sensor and car felt fine but went into limp again on motorway again at 70+ with no engine management light. i have noticed recently the noise of the turbo seems different, but again when i turn car off and on its fine. is my turbo on its way? could with finding out before warranty ends! any help greatly appreciated.

thanks

arran(gene90)