That was most helpful, I have printed it out thanks. You will never guess, I was sorting out bits from my old car to go into the C5 and I opened the glove box and found the Manuel to the car, just need to sit down and read it. The car is 110 bhp 2ltr automatic estate 2001, gave it a trip down to the sea side to day and it go's like the wind, it brought back memory's of when I had a BX citroen. Oh I am so grateful for all the help from you, you are so kind. Pat