megane DCI 1.5 issues, help

Hi guys and gals



Recently bought a 1.5dci megane as a daily bus and it's a great little car, comfortable, incredible on fuel and drives really well.



However I've noticed a few things and I'd Luke to know what toy all think the problems could be...

1. quite a lumpy idle


2. slight oil leak


3. phantom coolant issue : the car is using coolant at a frightening rate , there's no pool on my drive way nor is there any indication that is leaking at all. it just uses it's coolant at such a fast pace. eg: 40 miles takes it from Max to min on the resovoir indicator marks. can't be right...


4. the temperature display on dash board can't be right it's showing temperatures in excess of -4 degrees on a sunny day...

Really like this little car, perfect for a little run around, can someone hero me diagnose these little niggles so I can have them put right.



Thanks in advance