Hello Oliver, thanks for your message.
I am not sure about the time interval recommendation for cambelt change on the 3.0 dci.
I have the RENAULT Maintenance Record though, and in there it recommends 72,000 miles/5 years for petrol and diesel engines except for 3.0 dci where it specifies change at 120,000 miles ( but gives no time interval ).
The other specific thing mentioned for the 3.0 dci engine is Only Use 5W/40 ENGINE
to standard ACEA B3/B4, so that is clearly important.
As for parking sensor operation, I have yet to put my car into regular use - happening soon, so not sure about that. I think the front ones worked when I parked it in the garage, just before winter.
I think this is a fabulous car. So much so, that I am picking up a second one - identical model - for my Father tomorrow. There is nothing else like it in terms of luxury v value for money - in France I saw one at a main agent a couple of months ago - similar age/mileage/ condition except that it was a 2.2 and it was priced up at 16,000 euros. My 3.0 initiale cost me £3,400. The world most definitely has gone mad.