First time here, first Benz, too. Found her at the convenience store(!) back in September. Now she is ~intermittantly~ refusing to shut down. I have had a v-gauge on the system, but NOT as the problem is showing. Seems to have a "relationship" with the climate control, but even that is guessing... I've downloaded the WONDERFUL diagrams posted here and want to thank those responsible for the info!

Hoping to be a contributing member in future, but for now it's gonna be lurk 'n learn.