Thread: BMW M3 / M4 Sound and Exhaust System: Deep Dive and Interview
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      04-30-2014, 02:07 PM   #35
CanAutM3
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Drives: 2021 911 turbo
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2022 Audi RS6  [10.00]
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Quote:
Originally Posted by M6-Coupe View Post
what is that arrow up with number 7 ? the forth video at 1:12.
which feature is it?
Optimum shift indicator for fuel economy. See here.
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