I was recently reading an interesting thread on, of all places, BMWLand, concerning a potential weakness with the 320d engine (click here to read it - it's running into 50+ pages!). Anyway, there's several cases of blown turbos and engines caused when some small flaps inside the inlet manifold get ingested into the engine. Many posters believe that they break because large exhaust deposits in the EGR valve break away and jam the flaps, and then the whole lot goes inside the engine. As you'd expect, it seems to affect higher mileage cars, but also those that do lots of short trips. One recommendation on the thread is to regularly clean out the EGR valve. My question is would this same problem affect the A3? Is there anything in the service schedule to check and clean the EGR valve, and is it something I could clean at home?