Well, it's not a Merc, but it's the season of goodwill to all men, and I hope that includes old BMWs. My newly acquired 1984 BMW M535i E28 is super, the engine pulls like a train, but after some years of non-use when the fuel tank was filled the neck had corroded and it cracked. Supplying dealer sent me a new replacement fuel tank almost by return of post, from ECP, but no problems there. I had the car recovered to a local garage who are normally sensible but have had a lot of staff turnover of late. The tank was changed and re-filled with the petrol from the old tank (it was almost full). From that moment on it was gutless, hitting the throttle would make no difference, and then it would surge then almost stall. They removed the fuel filter, which of course was full of rust, put in a new one and after testing it said it was fine. When I picked it up it was fine for a mile then just became hopeless, I kangarooed across town never getting above 25mph even on a dual carriageway. I got out of the car with motion sickness (to which I have become prone). It will idle, but above that will almost die. I'm not taking it back to the garage to do as I no longer trust them - refilling without checking on the state of the fuel is just beyond belief. My idea is to get the fuel sucked out completely by one of those wrong fuelling specialists, replace the fuel filter, check the injectors and have the fuel lines flushed out. Any thoughts on plan of action? It is such a pain to have to sort out what was a lovely runner when I'd rather be getting on with the Merc W114.