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F12 / F13 M6 & F06 M6 Gran Coupe (2012 - current)
The third generation M6 based on the BMW F12/F13 6 Series and shares its 7-speed M-DCT gearbox, BMW S63 V8 engine and other technology with the F10 BMW M5. The F06 M6 Gran Coupe, based on the F06 6 series also shares the same engine, transmission and technology.

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Old 05-21-2014, 04:08 PM
Zax Zax is offline
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Location: UK
Join Date: May 2014
Posts: 6
Mein Auto: M6 GC
Clunk sound on start stop function M6 GC

Hey guys

I have a M6 GC 2.2k miles on it, from the first week of making the purchase I found that I could hear a clunk sound on the stop start function when active. The clunk sound is quite loud and distinguishable, only manifesting itself when start/stop turns the engine off and restarts it. I have taken it back to the dealership, they have checked it on its 1200 miles run in and found the sound levels to be normal according to data sent back to BMW in Germany. They believe the sound to be a lever engaging to stop the car from rolling, now what I wanted to know does anyone else have this clunk sound or is it a smooth start stop? Please help
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Old 12-15-2014, 06:23 PM
xhou1986 xhou1986 is offline
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Location: boston
Join Date: Jun 2013
Posts: 13
Mein Auto: 2013650gc, m6 coupe
It's very normal, the sound I believe it's from the double clutch transmission automatically selects the proper gear.
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Old 02-22-2015, 12:38 PM
PhantomCypher PhantomCypher is offline
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Location: Los Angeles, CA
Join Date: Sep 2013
Posts: 286
Mein Auto: 550i GT Maser Ferrari FF
I do have a clunk sound too when ASS is on. I just drove an X5 and X6 2015 back-to-back and their ASS is super silent. I would definitely chalk it up to the DCT in our cars.
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