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Discussion Starter #1
  • After 3 miles it has a sudden and rough down shift. Only noticed on one road taken 2 times per week.
  • Normal for 4 matic?
  • 45000 miles atf135fe. First atf change not yet done
 

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2014 E350 Sport
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Speed is 30 mph going up hill
Yes, I've had the same problem. Typically happens when downshifting from 5th to 4th or 4th to 3rd - and as you noted only when going up hill at about 30 mpg. Also typically happens when engine is cold. Suggest you make sure car does not automatically upshift to a gear that is too high for speed. Watch the tach. If <1750 rpm you should force downshift with paddle
 

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2014 E350 4Matic - Palladium Silver, Sport , 18k miles........
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743 Posts
Just MTBW - but you are 5,000 miles past the recommended ATF service. I would have the service done and re-evaluate the shifting.
 

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2014 E350 4Matic - Palladium Silver, Sport , 18k miles........
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743 Posts
All I know is that for 2014 My E350 require the B service at 40,000 miles which includes Transmission service.
 
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