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What causes cylinders 5 thru 8 to misfire check eng lite flashes

(1998 Mercedes-Benz S500)
in Fort Lauderdale, FL on April 09, 2013
on start up car has no power ran fine before problem started after been parked for couple of weeks
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Popular Answer
on April 09, 2013
review when last tuned. it may be due.
rec. fuel system clean. ethanol treatment to 1 tank premium fuel. ethanol blend in fuel causes build up in fuel system, combustion chambers, exhaust system and causes increased wear to spark plugs.
rec. oil stabilizer treatment with next oil change. recondition cylinders and seals(improve compression).

I could be multiple things like a vacuum leak, mass air flow meter the left bank's O2 sensors...

Scan the codes.

Also inspect the engine harness for shorts and deterioration.

Good luck!
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