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2007 CLS550: It drives..automatic..I accelerate from 65mph..trans…

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Pete, I just purchased a...
Pete, I just purchased a used 2007 CLS550, 79K, showroom condition inside and out. It drives incredible when using paddle shifters, however, when at hwy speeds in C mode and automatic shifting, it feels bogged down when I accelerate from 65mph to higher speeds - as if you were driving 30 mph then shifted to 5th gear all of a sudden, almost slight vibration. I have heard this is normal due to the gearing, however, I have also heard could be big trans problem,and to try chaning fluid/filter first. Any advice? Thank you in advance,

Tim
Submitted: 8 years ago.Category: Mercedes
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Answered in 3 hours by:
6/13/2010
Mercedes Mechanic: Michael Warfield, Factory Mercedes-Benz Technician replied 8 years ago
Michael Warfield
Michael Warfield, Factory Mercedes-Benz Technician
Category: Mercedes
Satisfied Customers: 3,143
Experience: Mercedes-Benz Master Certified technician
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C mode stands for comfort shift mode, S stands for standard. Also in C mode the transmission starts off in 2nd gear from a stop and may even skip a gear at higher speeds. The shift points rpm's and engine power is lowered when the car is in "C" mode to make a smoother shift. The fact that the car shifts exactly how you want it with the paddle shifters proves there is nothing wrong internally with the transmission. Drive in S mode for more powerful and direct feeling shifts. The only maintenance that is required on your transmission would have been a trans fluid and filter change at 40K miles.
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