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2008 SAT Jerk when coming to stop

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Old 03-05-2008, 12:12 PM
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A while back there was a discussion on how the 08 SAT in the 550 jerked when coming to a complete stop. I am just wondering if anyone has found a solution from the dealer or anywhere else. I am sure that i wasn't the only one with the problem. I have not had a chance to take it to the dealer. Thanks ...
Old 03-05-2008, 02:00 PM
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I don't have that problem but then again, I drive mine like an SMG all the time so I'm always downshifting manually all the way to a stop (with sport mode enabled.)
Old 03-05-2008, 02:15 PM
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I'm not having this problem either. Are other folks having this issue?
Old 03-05-2008, 02:33 PM
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Originally Posted by MidnightRider' post='540255' date='Mar 5 2008, 06:15 PM
I'm not having this problem either. Are other folks having this issue?
I have the problem sometimes in some situations. In normal mode it almost never occurs. In sport mode it sometimes occurs. In manual mode it doesn't occur. Pressing the sport button makes it occur most of the time. It jerks during the 2-1 shift coming to a stop. BTW, with the sport button NOT pressed, manual mode starts out in M2, avoiding the issue.

I have found if I modulate the brakes just right as I come to a stop I can feel it less. I can't tell exactly how I do it to make it smoother.
Old 03-05-2008, 03:31 PM
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Originally Posted by lee1224' post='540208' date='Mar 5 2008, 04:12 PM
A while back there was a discussion on how the 08 SAT in the 550 jerked when coming to a complete stop. I am just wondering if anyone has found a solution from the dealer or anywhere else. I am sure that i wasn't the only one with the problem. I have not had a chance to take it to the dealer. Thanks ...
This is a problem with the SAT, most notably in manual mode with Sport on. It happens due to the 2-1 downshift just as you come to a stop, resulting in a jerk even if your brake pressure is consistent.

One solution i've found is to manually downshift to 1st while slowing down just as the tach drops below 1k in 2nd. This ensures a smoother downshift than if the car does it automatically, allowing for a smoother stop.
Old 03-05-2008, 05:14 PM
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I have this minor annoyance and Rudy, I think I noticed it on your car too (in normal mode) when you were kind enough to let me drive it. I also had it even worse with the '05 545 I had. If anyone has been successful in having the deal address it I will bring it in. Otherwise, I will adopt the patch, and use manual mode.
Old 03-07-2008, 12:10 PM
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Originally Posted by jmatthe' post='540363' date='Mar 5 2008, 10:14 PM
I have this minor annoyance and Rudy, I think I noticed it on your car too (in normal mode) when you were kind enough to let me drive it. I also had it even worse with the '05 545 I had. If anyone has been successful in having the deal address it I will bring it in. Otherwise, I will adopt the patch, and use manual mode.

thanks to all of your responses. It sound like that it doesn't happen with all SAT, only some. I will take it to dealer and see what they can find, in the mean time i will try down shifting manually when coming to a stop.
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