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Hub Bearing, Differential Gear

(2006 Mercedes-Benz R350)
in Bristow, VA on February 14, 2011
When I am driving my 2006 R350 I hear howling noise on my left front wheel, I took it to the dealership and was told to replace the left bearing for $800. I took it to an independent garage and was charged $500 for the job. The problem did not go away, I still could hear the noise. I took it to another Mercedes dealer and was told that either they did not install it properly, I went back to the independent garage shop and they did replace the Hub again and still the noise persisted. I am confused, I did replace the front tires but still the noise did not go away
took it back to the dealership again and I was told that the differential gear is damaged also, they said it is a sealed differential and I have to replace the whole unit for $4300, and also the hub bearing wasn't done properly, what advice can you give, Can't I get a used differential gear for my R350
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Popular Answer
of Overbys Inc on February 15, 2011
If the MB dealer made the diagnosis and another shop simply followed that diagnosis, they did nothing wrong. You really need a good reputable MB specialist that can
diagnose the issue and can advise a repair. The dealer
most likely will not install a used differential. Also,
most independent MB shops will not install parts that you furnish; it's a lot like taking your own steak into
Outback Steakhouse and expect that they will cook it for you.
on July 28, 2014
FYI- There is an issue with carrier bearings in the front differential
of R Class, GL, and ML class vehicles W164 etc 2006-2012.
They seem to have a tendency to fry prematurely.
Mercedes will simply sell you the entire diff, and doesn't offer the bearings.
The bearings are difficult to source as some pieces are manufactured only at
the Timken bearing plant in Poland, but can be obtained on ebay.
You need only take the bearings to a shop that specializes in this sort of thing,
hand them the bearings, and they'll take care of the rest.
Labor was $500 to R&R the diff and replace the bearings on my 2006 ML350, and ALL the bearings around $300
+ the seals were about $100 at my local dealer.
Much less than what the dealer would charge. Anyone reading this in the future, try going to ebay and
googling KLM503311 or check here.
on February 15, 2011
This is again another example of why proper diagnosis is so important! Diagnosing AWD drivetrain noises is very difficult without the proper tools and equiptment.We use electronic chassis ears to pinpoint where these type of noises are really coming from. It is very possible the vehicle had both a faulty wheel/hub bearing and bearing noise in the front differential, but with proper diagnosis some expense may have been prevented. I agree with Overbys Inc. in reguards to the independent shop carrying out your request but it is policy at our shop to do our own diagnosis. The statment that the bearing was installed incorrectly is too vague and the only thing I can offer is that the shop possibly installed the bearing with magnets facing wrong way but would have set ABS,ESP and trac control warnings??
Yes there are salvage units available but they would only carry a 90 day to maybe 6 month part only warranty. If part failed you would be liable for a second labor charge. Replacement cost estimate through our shop without seeing vehicle with new parts would be approx $3900.00, slightly less than dealer but not by much. Salvage part $1200.00 to $1500.00 plus shipping.
My best advice to you may be to find a repair center you feel comfortable with a stay there!! Remember "If you pay peanuts you get monkeys"
Dan@ Waterloo Motors Inc.
48 years solely imports

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