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2007 Standard E350 / 71,155 mi.
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Discussion Starter #1
Whats up guys,

So I went in for an oil change at the MB Dealership in Nanuet, NY and I said that I have road noise vibrating and whining pitching noises at different speeds. Good people, friendly staff. But with the diagnostics and road test with oil change all together came out to $170 which isnt bad I was expecting above $200. They said that the noises are not the wheel bearing but choppy tires that aggressive. Which I agree and my rear differential. They recommended I replace it and she said it would approximately be $6300. WOW really? I knew it was going to be pricey.... but damn... I didnt know it was gonna cost me that much. So I said let me think about it. Is this a fair price? (I know there are a lot of good indy shops out there but for something like this... Id rather take it to an actual dealerships) The sound was low at first but now after a few months its increasing. I dont have that kind of fund where I can dish out thousands of dollars.. maybe in the next couple months.. but would it be safe to drive or will it snap soon. Anyone else have this problem or any comments? Would be helpful. Thanks.
 

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'01-E320 & 02-ST2
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31,633 Posts
What does this mean?: They said that the noises are not the wheel bearing but choppy tires that aggressive.

If the noise is from your tires, what is the issue with the differential?

At 71,000 miles I'd be talking to MBUSA for assistance. Regardless of an expired warranty, differentials don't fail that early absent something being screwed up along the way.

That said, I appreciate your concern about using a dealer, but I would find an indy MB specialist, have him diagnose the issue, and you can just replace what is wrong. There is no reason to replace the entire differential, there are bearings and ring gears and thrust washers and seals, all of which is a lot less money than the whole thing. I'm betting the dealer doesn't really know and is shotgunning the thing.

I'd also stick the thing on a lift, disable the ETS etc and run it up to the speeds where it makes noise. If it's not much different, you know it has nothing at all to do with the tires.

Good luck, man.
 

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2006 Merc E320 cdi
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981 Posts
71k miles and they're telling you the rear end is shot??

Bull cookies.. If you have the same size tires all the way around try rotating the tires from back to front. I had an awd car that was making the same sound and the sound miraculuosly went away when the tires were replaced..

I would first look at the tires, then second look at the tires, and third (well, you get my drift).........
 

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2007 Standard E350 / 71,155 mi.
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16 Posts
Discussion Starter #4
icic

I understand that.. but the car slips a bit.. and isnt that what the differential prevents it from doing? In any case the guy said the differential was noisy. Also do the tires grind at low speed the raise higher in sound? What I mean by aggressive is that the tread pattern is really thick and not really meant for mercedes but the sound is so awful it cant be just the tires. That I know because my trusted indy guy said the same thing... but he didnt say anything about a differential.. dammit.. at one point I was thinking it was the rims, tires, differentials, boots ... driving me crazy!
 

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05 E500 4 Matic
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89 Posts
My 05 E500 4 matic just had the rear differential replaced with less than 52,348 miles. This was last October 2010, my previous posts were regarding the "Harmonic" noise emanating from the rear/middle of car.
At first it was presumed that the 4 wheel drive wears the tires ( fairly new Continental DWS'). So I rotated the tires and no difference in the noise so I then had the dealer inspect it.
The dealer performed several road tests with techs, and also my ext. warranty ins. advisor who concurred that it must be the rear diff. My insurer and even MB did not think it was normal since it also affected the trans in some ways, what was also odd is that no fluid leaks were visible around the rear differential so where did the fluid go?
My invoice shows costs of :Replaced Rear Differential $ 1,050.00
Axel Housing 211-350-23-62-88-------$ 1,890.00
Transmission 000-989-28-03-12-------$ 25.35


Good Luck with your repair
Joe M.
 

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2007 Standard E350 / 71,155 mi.
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16 Posts
Discussion Starter #6
thanks for your response

but i dont understand?? how this the dealership approximate my repair at $6300? I havent done it yet but its like a down payment for a 2011 benz you know what I mean!? like ridiculous. My indy mechanic swears 100 percent its not the differential... but and i do trust him but im a worry brat so im getting new tires first like he recommended and see.. crazy right? 6300?
 

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2005 E320 CDI (W211)
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157 Posts
As suggested, try rotating your tires first. If the noise goes away, or changes, you're onto something, and might just be in need of a set of tires.
When I purchased my E320 CDI last fall, I had a "woomp, woomp, woomp" sound from the front, that I would have bet the farm was a wheel bearing going bad. I rotated the tires and the noise went away. So, I'll be getting a new set of tires soon.

Certainly not suggesting that it's impossible for differential to fail, but your miles are relatively low, as is the probability of a failed diff. Try rotating the tires first. After all, it's free (that is if you do it yourself).

Also, not sure what you mean by slipping? I may be wrong, but I don't believe our cars have posi-traction (or locking) differentials. As such, the tire with the least resistance can (and will) slip from time to time. At least mine does.
 

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2007 E350 4Matic P2; 2008 GL320 CDI P2
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20,153 Posts
Rotate the tires, or have the dealership put the wheels from a service loaned on the car for a test drive.
 

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2007 Standard E350 / 71,155 mi.
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Discussion Starter #9
I appreciate it.. big help all of you..im actually going to change my tires now and see.. ill let you kno through an update on this post...
 

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CL500, E430, SLK, Subaru...
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648 Posts
I appreciate it.. big help all of you..im actually going to change my tires now and see.. ill let you kno through an update on this post...
As an aside, I get "harmonic" sound at cruise in my old W210 E430 wagon, on a matched et of Continental tyres. For grip and wear they are great but maybe there's a brand/tread pattern problem that gets out as harmonics?
 

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05 E500 4 Matic
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89 Posts
As suggested, try rotating your tires first. If the noise goes away, or changes, you're onto something, and might just be in need of a set of tires.
When I purchased my E320 CDI last fall, I had a "woomp, woomp, woomp" sound from the front, that I would have bet the farm was a wheel bearing going bad. I rotated the tires and the noise went away. So, I'll be getting a new set of tires soon.

Certainly not suggesting that it's impossible for differential to fail, but your miles are relatively low, as is the probability of a failed diff. Try rotating the tires first. After all, it's free (that is if you do it yourself).

Also, not sure what you mean by slipping? I may be wrong, but I don't believe our cars have posi-traction (or locking) differentials. As such, the tire with the least resistance can (and will) slip from time to time. At least mine does.
The transmission in the 05 E500 did more of a drag thing than a slip sensation, as for the 6k plus quote use my price 3k which is from a MB dealer. The diff itself ranges from 1200 for a generic rebuild, to $ 1900.00 which is from MB, plus the labor of a $ 1,000.00 or so.
 

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2008 E350 4MATIC
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1 Posts
I had a similar situation as the OP, about a month after a trans & diff oil change. I started hearing a LOT of road noise. My dealer told me the diff was shot, along with a RR wheel bearing. They replaced both under warranty. I have about 38K on my 08 E350 4M.

Needless to say, I am very concerned.
 

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2007 Standard E350 / 71,155 mi.
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Discussion Starter #13
So I finally took my Indy mechanics advise.. and changed tires to the Bridgestone Turanza Serenity tires.. and guess what..... no more noise.. it was simply amazing.. like the tires I had before, I was wondering how the hell did it make so much noise that it was unbearable? Now, the car is soundproof. So instead of $6300 for a new differential, I spent $1003.98 for new tires. Way better. Im so pissed at the dealership for either lying, or making a guestimate!
 

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2005 E320 CDI (W211)
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157 Posts
Nice work. Glad to hear you got it sorted. These sorts of devious practices happen much more frequently than people think. That being; mechanics (and more often at dealerships) praying on uninformed customers, gouging them for huge bills for unnecessary repairs. In my opinion, it happens ever more often when the vehicle is under warranty. In those cases, the manufacturer gets gouged and the customer is merely inconvenienced. I'm not over-generalising here, and certainly suggesting that every mechanic dishonest. I've seen (first hand) many many instances of this, and I personally know enough people in the business (from mechanics/technicians, to service advisors) to formulate this informed opinion. Heck, most of them will freely admit to me that this stuff happens all the time. Anyway, glad yours is sorted.

Cheers, TJ
 

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old thread, but had a humming noise when going 30mph or more. 4matic has 54k miles on it. Told dealer i suspected the differential. Dealer after road tests and putting on lift and listening to pinpoint where it was coming from diagnosed as rear diff. Replaced the rear diff and did 4 wheel alignment. Car sounds alot better with no high pitched humming noise anymore. glad i have CPO warranty still covering the costs of $3400.

211-350-23-62-88 axle housing
170-990-00-10 bolt/washer
120-142-00-72 hex nut
126-997-00-41 general ring
001-0989-33-03-12 tranny oil
 

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2008 Merdeces have loud whomp whomp noise toward rear told by indy mechanic that wheel bearing bad and replace it, still have noise and additional problems now the abs and ESP is inoperative, had bearing inspected by others said to be in good condition. Indy was not able to get ABS and ESP working. How much danger am I in driving vehicle.

Gerald
 

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99 ML430, 00 ML320, 05 E500 4matic Wagon
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21,872 Posts
You just will not have those features working.

A pro grade shop scanner should tell him why and which part of the ABS/ESP is not working.
 

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2007 E350 4matic
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10 Posts
I recently had this same problem on my 2007 Mercedes E350 4matic. The rear differential was making a terrible rubbing noise, very similar to what a really bad wheel bearing sounds like. It turned out to be the outer pinion bearing. Like everywhere I have read, it would cost roughly $6000.00 to get a new one installed from Mercedes along with returning the old core.

I just got it fixed by having all the bearings replaced with 4 new bearings; 2 new pinion bearings/ races and 2 new carrier bearings/races along with having new seals installed. I saved thousands plus now I know I have brand new bearings and races, news seals and fresh fluid. Below are some pictures

Turns out these bearings were real hard to come by.

If anyone has this problem and is in the New York area, I am in Westchester County NY, contact me. I can have the rear differential rebuild done very reasonably.

I am updated this because now, more than a year and a half later from my original post, I have a lot more experience with the rear differential rebuild of this model car and a bunch of other models that use the same bearings. The problem with these rear differentials is the bearings. Especially the outer pinion bearing. And this is true on 2007-2009 Mercedes Benz E350 and E550 4matics, 2003-2006 E500 4matic, 2010 GLK350 4matic and probably other models also. I can guarantee at least those models from first hand experience. When Mercedes spec'd the outer pinion bearing from NTN, they did not make it heavy duty enough and most all of these models rear diffs will fail at some point. -So it is not recommended to buy a used one and put it in because its just a matter of time before that one will also fail. Now available is a new and improved outer pinion bearing that was designed and made more heavy duty and robust, with more rollers. Below is a link to buy them on ebay. Any capable shop that does rear diff. rebuilds can do it. It is pretty straight forward.

http://www.ebay.com/itm/07-08-09-Mercedes-Benz-E350-4matic-Rear-Differential-bearings-2-pinion-2carrier-/331963460253?_trksid=p2141725.m3641.l6368

my email is [email protected]
 

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E350 4M 06
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2,744 Posts
Thank you for sharing your experience with the members.
Diffs and TC's pricing makes no sense what so ever at MB, when you open up these boxes, you'll find standard ball and tapered roller bearings, seals and clutch packs..... and no they are not gold plated.
 

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2002 C230 Sport Coup and 2006 ML350
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Just thought I would point out that these parts are available, bearing and seals,
through BenzExpert.com or the benzexpert store
on ebay for LE$$!
The seller has 100% positive feedback since 1999 and also sells parts and bearings for other Mercedes vehicles.
Check it out.
Here's the link for the full kit as well as the individual bearings.

MERCEDES NTN DIFFERENTIAL BEARINGS CR-06A75.1 CR-08A76.1 CR-10A21.1 CR-10A22.1
MERCEDES NTN DIFFERENTIAL BEARING ECO-CR-10A22.1

MERCEDES NTN DIFFERENTIAL BEARING ECO-CR-10A21.1
MERCEDES NTN DIFFERENTIAL BEARING CR-06A75.1
MERCEDES DIFFERENTIAL BEARING NTN ECO-CR-08A76.1



Also, I can recommend a shop in the bay area, San Jose, who will rebuild your
diff for ~$300 off the car (your local guy removes and ships)
or $500 on the car, so about $800 for the whole sha-bang.
Send a PM if you want the name of the shop.
 

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