My 197 started showing a low battery warning. Under 1400 revs the battery will not charge. Have changed the alternator (twice) the battery, the surge protection box (twice) and the wiring from the alternator. Checked all earths which are fine. The car has now been sitting in a Renaultsport specialist for 7 weeks and they have apparently tried everything. It has had the top UK technicians baffled to the extent that they cannot rectify the fault and are now in contact with Renault France for further advice. I'm left driving around in a 1.2 Corsa hire car and have contacted Renault complaints.The likelihood is that they cannot fix the car and i already have substantial costs for a car that cannot seeminly be repaired. I 'm gutted. I love the car and have owned plenty of Renaultsport cars, but i am now at the end of my tether.I wonder if anybody has any suggestions as to what the fault could be, or if anybody has had a similar experience. I can't believe that a four year old car cannot be repaired by Renault UK and need some help please.