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No

and no.Get it on a lift and check for a blown gasket or a bad cat.Bad mounts lead to vibrations and excessive engine lift,not loud booming noises.Have it checked out ,before something checks out:eek:
:bowdown:
 
I've heard that 4 matic mounts are both more expensive, and harder to do.

Any truth to this?
The above question was asked in '07 and I didn't see any reply. This is on my 2-do list for the spring and I'd appreciate any insight that you may have. Above, there's a reference to the fact hydraulic lines for the self-leveling system make it difficult, if not impossible, to use the above method.

TIA,
 
Report my own successful experience

Just finished my 1999 E320 Wagon (standard transmission, not AWD). It took me a total of four hours. (including about 1 hour for loosening the top bolt on the driver's side!)

To confirm: the top bolt is 16mm. Therefore unfortunately my I did not have a correct size ratchet wrench. I was able to loosen/tighten the top bolt with a low profile 16mm socket wrench.

I had to temporarily move the A/C compressor out of the way, but there was no need to disconnect any hoses or cables.

I did one side at a time, first the passenger's side and then the driver's side.
The top part of the motor mount has a pin that fits into a corresponding slot on the motor side, thus the motor mount "aligns itself".

Conclusion: Success. Now my car idles as smoothly as a new car.
 
Just noticed we seem to have two DIY threads on replacing motor mounts...we should maybe merge them? Keep all the info in one place?

G-AMG's thread here is somewhat more extensive and has a full photo procedure documented.

http://www.benzworld.org/forums/w210-e-class/1340690-photo-diy-engine-mount-replacements.html

Perhaps merge the threads mods? Just my housekeeping $0.02...:D
Nothing wrong with two, I like the variation. ;) However, Merging is not the answer anyway because it would ruin the threads the way the software handles it (basically it weaves the threads into one, aligning the posts chronologically...which would be a mess).

Theoretically a nice idea, but rather than worry about the two DIYs on engine mounts, I'd be much happier if noobs would learn to use the search function so we wouldn't have dozens of posts on "MAF code" "regular fuel" and all the others that come up all the time. :rolleyes:

Take care and enjoy the ride,
Greg
 
2000 E320 Wagon

To confirm: the top bolt is 16mm. Therefore unfortunately my I did not have a correct size ratchet wrench. I was able to loosen/tighten the top bolt with a low profile 16mm socket wrench.

I had to temporarily move the A/C compressor out of the way, but there was no need to disconnect any hoses or cables.

I did one side at a time, first the passenger's side and then the driver's side.
The top part of the motor mount has a pin that fits into a corresponding slot on the motor side, thus the motor mount "aligns itself".
I took a look at mine yesterday on ramps, and I cannot see how you can get into the passenger side top bolt to get it off, from the top it seems like the airbox is in the way? The driver side seems like the AC compressor moved will allow access, but the passenger side is confusing me a little. I have a 5/8 ratchet wrench but seems too long to get in there. Do you have any other helpful hints? Thanks.
 
I managed to take out my passenger side mounts from below using the '5 Stubby tool' from autozone. See this thread and you will see the pic. No need to come from the top unless you want to remove airbox which ofcourse is a one minute job.

I used ramps and all my work was done from under teh car. Took me 6 hours but I am a newbie.

The hardest thing was torquing all bolts (50NM for top bolts and 35NM for lower bolts) as my torque wrench would not fit. Lower bolts are OK as there is enough space for a torque wrench.

Good luck...
 
I managed to take out my passenger side mounts from below using the '5 Stubby tool' from autozone. See this thread and you will see the pic. No need to come from the top unless you want to remove airbox which ofcourse is a one minute job.

I used ramps and all my work was done from under teh car. Took me 6 hours but I am a newbie.

The hardest thing was torquing all bolts (50NM for top bolts and 35NM for lower bolts) as my torque wrench would not fit. Lower bolts are OK as there is enough space for a torque wrench.

Good luck...
What exactly is the "5 stubby tool", I went to Harbor Freight and Pep Boys and couldn't find a stubby 16mm ratchet wrench at either place. Did you torque the top bolts by guestimate?
 
DONE

Well, I found a local mechanic to change both of mine for $60 labor, car runs like new again, no vibrations. I can't believe I waited so long before changing them.

He was able to use a air ratchet for the top bolts to break them loose.
 
Engine Mounts - Many Thanks! and more!

The engine mount DIY posts are old, so I want to make sure the proper thank yous get sent out.
Very big thank you to texas-patrick and G-AMG for their DIYs on motor mount replacement! I finished the job today and OH MY GOODNESS what a difference! I have seen posts where people have said their gas cars felt like diesels when the mounts failed. That was me - now the car feels like it rides higher, smoother and quieter and yes I am enjoying the ride! Awesome and I can't thank you enough for the guidance - you saved me major $$!

I do have some comments about the DIYs and other posts from other owners in hopes that I am making a contribution (I am a shade tree mechanic with no access to a lift):

1) Space in doing this job is VERY limited. I have larger than average forearms. Doing the passenger side mount wasn't that much of a problem when it came to space. The driver's side was different. I employed someone smaller than I with strength to get to, unbolt, and replace the top side motor mount bolt. I couldn't get to it seemingly no matter what I did. So, a small payment to a kid that needed it - no big deal.

2) If your mounts are leaking oil as mine were, BE CAREFUL getting them out from beneath the car. The oil can end up in places on your face you don't want. It missed me, but that stuff is nasty!

3) I used rhino ramps for the car and a 4 ton Craftsman hydraulic jack to jack the engine up higher for removal and re-installation. Once replaced, especially the driver's side, it is easier to let the engine back down to fit the bolts correctly.

This is NOT an especially difficult DIY - but BE PATIENT and vigilent and you'll be absolutely pleased with the result.

Again, thanks to everyone for their posts and help!! I'm hooked and pondering a higher level of membership!
 
Thanks for the great pictoral! I replaced my motor mounts today. 98 E300TD. I was like, wow! My mounts were comletely shot. What a difference the new mounts made. I had alot of vibration before, as you may imagine after looking at this pic. Now, zero vibration and no more rattleing noises inside the car.

Image
 
Over 4 hours lost on the engine mount this past saturday,
It was my plan and have been studing your post and texas patrick post for the last 2-3 weeks. So I started with removing the serpantine belt wich was piece of cake, then went under the car and removed the 2 lower engine mount screws wich was very easy, then i unbolted the AC compressure and pushed it forward as recommended, no problem, now tried to remove the top bolts for over 2 1/2 hours but at the end I gave up I tried all the possible tools including an open wrench but I couldn't get enough grip to remove or even to loosen it, I was so disapointed about the whole thing and had to put everything back together. Any advise or tricks about how to remove those D*** bolts? !! I am very good with my hands but I guess not good enough on these suckers.
 
Over 4 hours lost on the engine mount this past saturday,
It was my plan and have been studing your post and texas patrick post for the last 2-3 weeks. So I started with removing the serpantine belt wich was piece of cake, then went under the car and removed the 2 lower engine mount screws wich was very easy, then i unbolted the AC compressure and pushed it forward as recommended, no problem, now tried to remove the top bolts for over 2 1/2 hours but at the end I gave up I tried all the possible tools including an open wrench but I couldn't get enough grip to remove or even to loosen it, I was so disapointed about the whole thing and had to put everything back together. Any advise or tricks about how to remove those D*** bolts? !! I am very good with my hands but I guess not good enough on these suckers.
LOL, I had similar problem on doing it for my E430. I could not loosen the top bolt on the passenger side so I put everything back to try again another day. I finally overcame the problem with some proper tool. The tight space was also the big obstacle, the arm to turn must be long to be powerful to turn (torque = F x L). I actually bought the metric ratchet wrench from Lowes, the kind that could give 5 degree tight turn.
http://www.lowes.com/pd_262903-87494-87113_4294962788_?productId=3099751&Ntt=ratchet%20wrench&Ntk=i_products&pl=1&currentURL=/pl_GearWrench_4294962788__s?Ntk=i_products$Ntt=ratchet%20wrench
Loose the bottom bolts but don't remove them.
Raise the engine a bit, raise 1 inch first then try loosing the top bolt. The reason? the whole engine is weighing on the worn mounts, on the bolts. No go? Raise the engine 1 more inch. Try again.
On my car, passenger side, I had to use the trick that another member posted. I locked the wrench on the top bolt, a long conduit against the side wall gave the leverage. A 5 degree turn was all it was needed. Then the bolt came loose easily.
On your car, find a safe and good place for leveraging the wrench.
Disconnect the battery. I made some sparks!!!
Jack the car up safely.
 
Engine mounts 98 E320 4matic

Hello all,
I just finished the replacing the left engine mount on my 98 E320 4matic and wanted to comment on the differences of the 4matic.
This thread definitely helped in diagnosing and for the the most part, was very accurate. The only problem I encountered was removing the original mount from the engine compartment after unbolting it. The left halfshaft prevented the mount from moving forward, towards the A/C compressor. With A LOT of patience I was able to negotiate the limited space between the unibody and engine, and remove the mount up and forward, over the half shaft, and behind of the power steering pump. The compressor DID need to shift forward because I also had to loosen the power steering pressure hose and rotate the fitting down about 45 degrees. Only other item removed was a heat shield secured to the unibody, it gave me that little extra space to get the mount out. This was one of those of jobs where you need a lot of patience. When you get the mount positioned just right it will slide right out from the top, and the new mount slid in the same. Total time was about 4 hours (remember this was uncharted territory for me).
And the car runs beautiful! The new mount made an unbelievable difference. Will tackle the right mount soon and post info if needed.
Thank you everyone,
JJ
 
Is there other ways to ck if the oil has leaked out of the mount? is it visually possible or the "rough acceleration etc" essential to the problem?
Just to be clear, it's not rough acceleration, it's rough idle in gear.

You can also have an assistant sit in the car, foot hard on the brake, transmission in gear, engine hot and idling...then with the hood all the way up (to make it easier) grab the TPS and rotate the mechanism a bit to rev up the engine. If it rises and falls pretty easily and quickly, the oil is probably gone from the mounts.
 
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