Same with Citroen C3. Message came up hadn't a clue and nothing in hand book. Saw this forum, went to Halfords and purchased battery for £3.99. For insurance purposes staff are not allowed to assist with taking out the old battery so you will need to take out the battery in the store so that they can see the code and they will sort one out. Bob's yer uncle!
Buzzyvonne, March 2013
