I bought an 500sl from my neighbor, the engine has not been started since early 2007 and just 3 days ago after I replaced a new battery, I tried to start the car, the engine turned and it took me about 12 tried to start up the car, once started the engine missed and could not idle and I could not rev the engine higher that 1700RPM. I also noticed that the gas gauge, tach, oil pressure do not work and the SRS light was on. Once the engine started it seems as the car was running too rich and there lots of black smoke came out of the tail pipe. Can you please advice me as on this matter.