My 172 died on Friday, and i am now driving a lovly Yaris 1.0.
I have noticed for a few months now loud clunking under acceleration. This has been getting progressivly worse, so i have visited renault on many occations to get it looked at. However lots of other things have been wrong with the car (master brake cylinder leaking) therefore they refused to test drive to diagnose the problem. The car was finally booked in for them to look at this clunking noise for a couple of weeks time.
On friday the Clunking got alot worse, and i discovered that the ECU metal cover had sliped of its mount (above the battery) and was flapping about, so i went to renault in my lunch break to get it looked at. The bloke took one look at it and said "fu*k me" The engine mount under the battery had totally failed, the battery was sitting at about a 25 degree angle and the engine was resting on the subframe. God knows what other damage there is have 2 wait until next week for that suprise.
Moral of the story. If you have clunking or knocking under acceleration demand that renault look at you engine mounts ASAP.