2011 E350 low mileage - problems
Thread Starter
Junior Member
Joined: Jun 2011
Posts: 34
Likes: 4
From: Wisconsin
2015 E400 Coupe, and 2011 E350 Sedan
2011 E350 low mileage - problems
Car bought with 27,000 miles on it - full CPO.
Previously at 64MPH a whining noise could be heard when you let off the gas and coasted down hill.
So far the dealer has replaced:
Wheel Bearings in front
Entire Transmission
Front Differential
The noise went away for about a week... and now:
At exactly 54 MPH the engine/car makes this HORRIBLE high pitch whining noise.
So it's going back in for the 5th time for the same damn noise, and now an additional problem with some loud droning noise coming from the exhaust. My car now sounds like a 1996 Buick with 100k miles on it.
Any thoughts on this noise??
Previously at 64MPH a whining noise could be heard when you let off the gas and coasted down hill.
So far the dealer has replaced:
Wheel Bearings in front
Entire Transmission
Front Differential
The noise went away for about a week... and now:
At exactly 54 MPH the engine/car makes this HORRIBLE high pitch whining noise.
So it's going back in for the 5th time for the same damn noise, and now an additional problem with some loud droning noise coming from the exhaust. My car now sounds like a 1996 Buick with 100k miles on it.
Any thoughts on this noise??
Thread Starter
Junior Member
Joined: Jun 2011
Posts: 34
Likes: 4
From: Wisconsin
2015 E400 Coupe, and 2011 E350 Sedan
Answered. Hoping to get to bottom of this... the noise is unbearable, and one highway I drive is 54MPH for 45mins 
The exhaust noise is new and also bothering me, but that isn't as bad as that whine.
The exhaust noise is new and also bothering me, but that isn't as bad as that whine.
Newbie
Joined: Dec 2011
Posts: 13
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2011 E-Class, 2003 ML500
Interesting. We had the entire transmission replaced on our 2011 E350 and then the transfer case replaced about a month later (after it seemingly felt like it was stuck in AWD). This was about 2 months ago. Car has 53K. I guess I'll have the wheel bearings checked too as it's still a little noisy at certain speeds.
Thread Starter
Junior Member
Joined: Jun 2011
Posts: 34
Likes: 4
From: Wisconsin
2015 E400 Coupe, and 2011 E350 Sedan
They also replaced the transfer (I assumed this was part of the transmission.) My appointment is for the 15th, I fear from my research that this new noise in the rear may perhaps be the differential. All said and done, if that is the case this car will have had more repairs done than the car was worth when i bought it if you had to pay for all this at a dealership. Thank God for warranties!!
Junior Member
Joined: Nov 2014
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E3504MATIC
They also replaced the transfer (I assumed this was part of the transmission.) My appointment is for the 15th, I fear from my research that this new noise in the rear may perhaps be the differential. All said and done, if that is the case this car will have had more repairs done than the car was worth when i bought it if you had to pay for all this at a dealership. Thank God for warranties!!
