Regarding leaving your engine running at the pump; it maybe just me but unless you took an exit ramp into the service station the turbo needs no cool down, it does it automatically as you drive at a slower speed. Diesel is not easily ignited but the vapors will ignite regardless. No one can be in that much of a hurry unless your a NASCAR driver, even those guys have a fire crew standing by when they're gassing with the engine running. It is illegal in most states to leave an engine running while fueling.
There, that's my rant for the day, it's raining here and I ain't happy.

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Doug
'83 300SD "Old Gold" 170,000 mi.
'82 380SL "Green Machine" 190,000 mi.

Some days you're the pigeon, some days you're the statue... I'd rather be the pigeon!