I have a 450SL 1980 Model with 130.000 miles on it and a mechanic just changed the fuel injectors and timing chain before I bought the Vehicle.
I’m restoring this car, so I crank it only every once in a while.
The problem I have is that it takes a long time to start the car and then after I get it running it runs very ruff until I get up to about 1800 RPM.
Any ideas what that is.

Thanks

Gunter