I don't have an ML, but I've owned a '04 E500 and currently own a '00 G500 which both have the same M113 engine as you do.


Though not ideal a voltage 10.7 should be enough to run the pump.



I would first look at things like crank position sensor (rear top of engine left side) and then cam position sensor (front of engine where cam would be right side). I'd think those would likely throw a check engine light but didn't always happen on my E500 which was always doing something wacky electronically.



Best of luck.

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Old Blue - '83 240D 6 speed manual trans, OM648
Green Machine - 2001 Europa G500
'87 300SDL Bought on Peachparts
'02 E320 4matic wagon

Patchouli Wagon - 2004 E500 - SOLD
333k mile 97 BMW 750il V12. - SOLD
The Californian - 85 300TD - SOLD
Daily Super Sedan - 03 Audi S8 - SOLD
Family Truckster - 2012 VW Touareg TDI - SOLD