My 2010 A160 Blue Efficiency Avantgarde is going in for its first annual service next week. Whereupon I shall be renewing my 'discussions' with the dealer about its unusually noisy idle. Sounds a bit like a diesel or a bit like a belt not running true although - to my untrained eye - I can't actually see anything amiss and the car drives ok. Just that others I have driven don't sound so noisy. I got them to look at it a few months ago and 'no fault found' and 'it'll probably settle down' was the response. I would be grateful to hear if anyone has experienced anything similar - or for suggestions about a likely direction I can point them in.