S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

jerky tranny on a 600

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Old 08-05-2009, 10:56 PM
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2007 S 600 / '06 911 Porsche C4S cab
jerky tranny on a 600

Only in the C (comfort) mode, when taking off from a start, it jerks into the next gear. Noticable, not subtle and often accompanied by a little squeal!
Someone in this forum suggested taking it from a dead stop on an on ramp to a high speed to "reboot" or "clear" the tranny. That doesn't work.
Anyone had this??
Old 08-05-2009, 11:24 PM
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2007 S600
Yes. Mine did this once when new. Get the service tech to reflash your TCU module and probably the ECU module along with it.
Old 08-06-2009, 07:19 PM
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I believe someone replied before on this with the TSB #:

https://mbworld.org/forums/new-s-cla...n-shifts.html?

Last edited by nyca; 08-06-2009 at 07:22 PM.
Old 08-09-2009, 10:58 PM
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2007 S 600 / '06 911 Porsche C4S cab
thanks! I never did take it in but will do...

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