2000 mercedes e320 problem, need help

If the car was driven for a few miles (~20) then stopped for 30-40 min, it will not restart. The car cranks but engine won’t turn on. The car starts without issues if left for another 30 min. Dealer can’t find any problems with battery, charging and starting systems. Problem happens intermittently (2x this past week, 4x last 2 months). Car has 86000 miles.

If it’s cranking OK, it’s not likely to be the battery, charging, or starting systems. Maybe a crank position sensor, they tend to cause hot starting problems on these engines. Check with these guys:

http://www.mercedesshop.com/shopforum/forumdisplay.php?f=1

Thanx for the info, that will give the tech something to try next