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      03-29-2012, 06:30 AM   #113
h-manuk's Avatar
Drives: BSM 1M Coupe
Join Date: Jun 2011
Location: UK

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Originally Posted by ianf View Post
See around the 2:35 min mark re M button ... Changes mapping, more power
The M button changes throttle mapping only and does not give you more power. You will get more power on full throttle with overboost with or without M button depressed for 7seconds only!

Changing the throttle map makes the car feel sharper and more responsive. A lot of so called tuners change the throttle map only and then tell the customer that they now have more power.

The only M car I recall that the M button gave more power was in the E60 M5 and E63 M6
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