The only Meter that I am aware of you can use is the Fluke 87 and 88. I have a bulletin at work that shows how. The pin is #3 but you have to do some special things to get the right reading. I'll see if I can dig it up for you.

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Benzmac:
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM