It seems like the 500E is now having hot start problems.

The FPR is not leaking and holds vacuum.

After reading the LH Block Diagram (30-0010.pdf), and not wanting to spend for a new throttle body (engine wiring harness is NOT cracked), I'm going to throw some inexpensive parts at the problem:

Brake Switch: 001 545 01 09
Throttle/Idle Speed switch: 140 545 01 14
Air Temp. Sensor: 009 542 68 17 ( B17/7 )
LH Coolant Sensor: 008 542 45 17 ( B11/2 )

Another culprit could be the "Diode Matrix for engine speed increase".

Unfortunately, I cannot locate this part number, it's location is "V2" but from the diagram, I can't tell where to look.

I am also unsure about the LH coolant sensor pn#.

Together these should be under $100.

Wish me luck . . .

:-) neil