[QUOTE=JamesDean;2637882]basic multimeter will suffice..

@ X11 connector (round guy typically found on drivers fender under hood on 201's)
duty cycle = (voltage at pin 3 / battery voltage) X 100
(connect meter ground to pin 2)

this will give you an approx. value for duty cycle.

Should be 70% Key on, engine off for federal. 85% for cali.



that's almost exactly what i was looking for.... the final piece is "what setting do you set the multi-meter on?

I am completely ignorant when it comes to electrics

__________________
1989 300ce 129k
( facelifted front,updated tail lights, lowered suspension,bilstein sports, lorinser front spoiler, MOMO steering wheel, remus exhaust,stainless steel brake lines). (Gone)

1997 s320 154k (what a ride). Sold with 179k miles. Replaced with Hyundai Equus

1994 e320 Cabriolet 108k



1972 280se 4.5 153k Owned for 12 yrs, sorry I sold it


[/SIGPIC]