New to MB's & Diesels....help

[keith.o]

Hello to all and many compliments on an outstanding forum. I just purchased an '87 300 SDL with 220,000 miles. It was a one owner car up until 190,000 and I have all the dealer & maint. papers up to then. The car is very solid and clean inside and out but I do have a few concerns mechanically. It has a terrible cold start. It will fire right away but run very rough and stall after 5 or so seconds. It will do this 4 or 5 times (until it gets a little warmed up?) before it will stay running and then it runs a bit rough until fully warmed up. It doesn't have any knocks or hesitation. I'm noticing a lot of black smoke on start up and also during acceleration and I am VERY disapointed with low and mid-range acceleration. It is almost embarrasing to drive in the city. I can't percieve any feel of turbo boost. I'm going to start with replacing the air (very dirty) and fuel filters and any suggestions would be greatly appreciated. The trap ox. was removed by the dealer. I would also appreciate the name of an honest repair man (for the major stuff) in the metro detroit area. Thanks to all in advance!

Keith