This is a huge big thank you to all those that helped me with my question, posted 14/7/05. The problem was a engine diagnostic warning light coming on, my W reg E 240 estate. In the reply's i received ( of which there were five), everyone of them mentioned a MAF sensor. This advice was correct. As the garage i purchased the car from gave me a six months warrenty, i was very keen to get this problem solved . With this information i was able to tell the garage what the exact problem was , so the garage acted and sent my car to be fixed at the local MB dealership. The car came back last weekend and it fixed and fantastic. Once again i cant thank you enough , the advice was quick and right. Good effort. dolmanp.