I am new to this forum and I have a ML320 with 270K miles. The transmission has a leak which I need to locate and fix. Thanks for all the help from this forum. The problem I noticed is when the transmission fluid is low it starts to slip but the engine shuts off. Is there a sensor or something which shuts the engine off?

Not in the trans.

Most common reason for engine stalling is the crank position sensor.

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

Yes it was the CPS sensor thanks for this information. The SUV seems to be running smoothly again.