M5 Guru (>2000 posts)
Join Date: Nov 2008
Location: New England
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What does "within specification" actually mean? The specification window is large and exists for the convenience of the technician.. At one end tire wear can be minimized and at the other end, not so much.
I've run camber of -2.0 in the front and -2.5 in the rear and didn't experience that kind of tire wear. Too much toe in and went through a set of rear tires quickly due to excessive inner tire wear because of excessive toe in. I don't go to that shop any longer.
From the factory, camber is not directly adjustable in the front. I'd find a different shop if they're telling you "the front camber is completely maxed out with no more adjustment left." It could be a simple mistake but did they even try to adjust it? What were they adjusting if they tried?
The difference side to side is interesting and ultimately the camber measurement can be affected by the other adjustments made in the front. There are numerous companies that offer camber plates for the E39 M5 of you want to go that route but I'm guessing you have other problems that may be attributing to the tire wear. I'd also be surprised if the other tires don't show abnormal but not excessive wear.
2/2001 M5, Jet Black, Exclusive Complete Black Walk Nappa Point Heritage Leather, Black Cubic Trim
8/2011 X5 xDrive35d Sport, Black Sapphire Metallic, Black Nevada Leather, Fine Burr Walnut Trim