My ML320 has an open center diff that doesn't lock; I thought the 430's were similar. Anyway, where would you find a dyno shop with two sets of rollers? They would have to be adjustable for various wheelbases.

It'll be really interesting to hear what Gilly says...

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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)