To the best of my knowledge there is not a scanner available to the consumer that will access all the systems of an ML. For emissions related codes you have a variety of options (I use Car Code OBD-2 or VAG-com to scan CEL codes).

There is a system called Carsoft that does more than just OBD. It is not inexpensive and not available to the consumer.

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Lenny

There are only three sports: bullfighting, motor racing and mountaineering; all the rest are merely games. --Ernest Hemingway

'10 GL550/'04 BMW 545/'99 BMW 323/'98 ML320/'87 VW GTI (race)