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Everytime I follow the procedure, I get to the depress gas ... when I do that it cancels the launch control .... must be doing something wrong
 

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Discussion Starter #3
I figured it out ... need to depress gas all the way to the floor ... this thing really takes off using race start!
 

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From page 183 of the U.S. owner's manual: "RACE START is only available in AMG vehicles."
 
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Everytime I follow the procedure, I get to the depress gas ... when I do that it cancels the launch control .... must be doing something wrong
It says to turn off esp then hold the brake down hold accelerator to the floor then release brake pedal
 

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As you discovered there's a detent on the gas pedal throw and you need to press hard past same to assure wide open throttle.

Similarly the brake must be very firmly applied.

As you may know, for launch control stress reduction make sure your Oil temperature is up to norm, which takes quite awhile longer than the coolant temp.

[note: my launch control experience is with Audi but similar conditions and procedure]
 
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