Hello everyone,

Iam new here and just bought 1986 Mercedes 560SL which has been sitting for the past 3+ years and now when it is started(cold starts immediately) has a rough/shaking idle and after it warms up a little stalls.When I get to drive it ,drives fine but as soon as I slow down and remove my foot from the gas it stalls and dies.I need to crank it a few times to start again and that will repeat.
Although the car starts right away when it is cold but still has some shaking .The new spark plugs are all black and were wet when I got the car .
Also,the odometer and the tachometer don't work only the speedometer works.

Any advise and help would be greatly appreciate it!