Are you guys for real, complaining it's freakin dust on these testmules?!?
These testers are getting trashed, why... because when we're buying them, they're supposed to be flawless. (as in not full of dust..)
As for the limp mode, i think it's just a SW issue, my guess is that the testmule F10 M5 have been trashed way more than any civil M5 ever will be.
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3 series: E30: 89 325i, E36: 92 325iC, 94 320iC, 96 320i Convertible, 94 320iaC, E46: 99 320ia, E90: 06 318i Le mans, E91: 07 318dt
5 series: E39: 97 520ia, 01 530Dat, E61: 09 520Dat
X series: E83 05 X3 2.0d, E84 10' X1 2.0 X-drive DA, F25 13' 2.0da X-drive.