I am looking at buying a 1995 S600 that has been sitting for about 18 months.The car cannot hold idle,when started it turns on,but then will turn back off if the accelerator is not held down.The engine temperature can be brought up to operating temperature,but the oil pressure gauge does not move.I do not know if the gauge is broken or not.The ASR light is illuminated and after a while,all the lights will flash,then turn off,but the ASR light will remain illuminated.Also,there is a sucking noise coming from the engine as if air is being sucked in.Any ideas as to what the problem could be.

__________________
1998 S500
2006 E320 CDI
1963 220S
1994 S500
1995 S500
2005 BMW 545i sport
2007 GL320 CDI
2007 ML320 CDI
1991 Toyota Previa White over Blue
2000 Lexus RX300 White over Beige
2008 Audi Q7 Black Opal over Grey
1993 Toyota T-100 Silver over Grey
2002 Chevy 2500 Express White over Grey