Hi guys, you folks have helped me out several times over the years and I'm asking for your help again on a very frustrating problem I am having. The engine will die after idling anywhere from 15-30 minutes. I have replaced the crankshaft sensor with a new OEM (from Mercedes dealer) and the car ran great for 3 weeks then died again on the freeway. The car will not restart unless it sits for several hours to cool down, then it will restart. I had it towed to a Mercedes repair shop and this is what they have done.

" (1) Check engine light illuminated. Scanned for faults in ME and found the following: P1615:Control module voltage. P1330: Starter control. Both faults were current with engine running and do not change state when engine stalls. (2) Checked for drive authorization. Drive authorization present when engine stalls and no drive authorization faults current or stored. (3) Tested power input to ME and battery voltage is always present even when engine stalls. Checked resistance of ME grounds, all good. (4) Performed visual check of ME connector, wiring harness and crank sensor connector. No problems found. Double checked installation of crank sensor, no problems found.(5) replaced crank sensor to rule out faulty replacement part. (6) Installed new K40 relay. (7) Installed new fuel shut-off valve. (8) Removed all ME and sensor grounds, cleaned and reinstalled. (9) Checked power supply to fuel actuator on injection pump while engine stalled and power supply always maintains battery voltage.
Unable to find root cause of engine intermittent stalling at this time"

They sent me an invoice for $1365.44 and told me to make arrangements to have my car removed from their property!