I checked out the site / link provided. Sounds like the only sure way
to go is to use the booster, ( these may or may not be available to me - vehicle is in Acapulco ), or B) take the battery out, charge it & put it back
to avoid any surge issue caused by jumping.

As mentioned in my initial post, I did fry a key once. Let me say I am 100%
positive I did neg to neg, pos to pos.

Actually this is how I did it as I recall. 1> ML battery dead on cranking; 2 >
second vehicle idling, place neg on idling vehicle, then neg to ML, 3 > place
pos on idling vehicle, then to ML; 4 > cranked and ended up at the dealer ...
with the key / ignition switch issue. << I am sure I would have left the key in
the ML ignition during the cable hook up process...big mistake ?? >>

** If anyone sees anything I did that was obviously wrong let me know.

The above link gave lot of info, but sort of left the jury out on a cable to cable jump. I know it sounds simple ( have jumped lots of cars in 50 yrs. )
But as mentioned the ML ended up at Sugarland MBZ.

Let me know your thoughts.

Thanks