Mercedes-Benz Forum - View Single Post - 2014 E350 W212 Transmission Clicking Noises + Hard Downshift at Higher Speeds
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post #9 of (permalink) Old 05-01-2019, 11:36 PM
Black Swan
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Date registered: Sep 2015
Vehicle: 2010 E3504matic , 1998 E320
Location: Easton, MA
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Originally Posted by Matt Davis View Post
It seems to have improved a bit. By no means is it perfect. I test drove another 2014 e class and it shifted much smoother. Mercedes said it could take up to 2 weeks for the adaptations to learn.

You're lucky they were honest in admitting they have no idea what it could be. It gets expensive when they decide to throw parts at an "unknown" issue. I highly doubt 2 weeks of driving is going to resolve the hard downshifts.

Have you by chance checked your motor/transmission/rear sub frame mounts?
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