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Engine mounts and wheel bearing tightening

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E-Class (W211) 2003-2009

Engine mounts and wheel bearing tightening

 
Old 01-22-2015, 07:38 AM
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Engine mounts and wheel bearing tightening

Hello -
I took my E350 to the dealer yesterday. The diagnosed 4 engine mounts at about $725 and "tightening the front wheel bearings" for $130.

Questions
- Do these prices seem reasonable?
- The car has close to 100k miles on it. Should engine mounts go this soon?
- What does wheel bearing tightening consist of? I've never heard of.

Thanks in advance - David
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Old 01-22-2015, 09:45 AM
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2007 e350, 2013 C250, 2004 C320, 2003 C320, 1998 CLK 320
Originally Posted by db2001 View Post
Hello -
I took my E350 to the dealer yesterday. The diagnosed 4 engine mounts at about $725 and "tightening the front wheel bearings" for $130.

Questions
- Do these prices seem reasonable?
- The car has close to 100k miles on it. Should engine mounts go this soon?
- What does wheel bearing tightening consist of? I've never heard of.

Thanks in advance - David
I'm pretty sure you only have 2 engine mounts. There is also a transmission mount that most likely would be replaced when you replace the engine mounts. I've replaced them on the E320 once at 100K and getting ready to do it again. The E350 is still holding up at 80K but I'm sure they will be due soon. I'm getting ready to do the C320 either this weekend or next weekend. Gotta drop the exhaust on the C class.

Not very funny story on the wheel bearings. The tire place tightened up the front wheel bearings on the E320 a couple years ago. Wheel fell off about 12 miles later. Fortunately the Wife was not injured. They messed something up and the wheel hub came off. They fixed it at their costs but needless to say.. they don't tighten wheel bearings on MB anymore.
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Old 01-22-2015, 10:47 AM
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3 mounts, 2 engine 1 transmission. Bearings have a specific preload set. Normally in inch pounds of preload. No reason to be in a bearing unless you had a problem, they were working to solve or alignment. Otherwise I would be suspicious of the total job based on the tighten wheel bearings as a single item.
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Old 01-22-2015, 12:19 PM
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Originally Posted by vettdvr View Post
3 mounts, 2 engine 1 transmission. Bearings have a specific preload set. Normally in inch pounds of preload. No reason to be in a bearing unless you had a problem, they were working to solve or alignment. Otherwise I would be suspicious of the total job based on the tighten wheel bearings as a single item.


With the front wheel bearing on a non-4matic, there is no 'preload'. There is a bearing play measurement needed to do the job correctly.


See here
http://www.benzworld.org/forums/w211...earings-2.html
Note the attachment at post #12.


I wouldn't have the bearings tightened for $130 unless they are to be repacked with fresh grease. Not a difficult DIY FWIW.


Not sure about the engine mount count of 4 either for your V6, but 725 parts and labor from the dealer is not a bad price IMHO.
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