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2005 S600
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Discussion Starter #1
Among a few other repairs (turbo bypass valves, hydraulic hoses, ABC pump) I’m doing my S600 engine mounts.

The engine has been vibrating (gasp!) a bit at idle.

Shown in the picture are the new and old mounts side by side.

Quite a difference!

The old ones have really collapsed, and fluid leaks are evident on the rubber.

So, whether or not you’ve got a bit of vibration, by 100,000 miles, they’re toast...
2605567
 

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2007 E220CDI, 1990 300E-24V, 1987 W124 3.6 AMG build 1993 E500 W124, 94 320CE, 1997 W140 S280
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Wow that's quite a difference! Great job. Only genuine parts for a job like that! Is it possible at all that you might be able to provide a measurement as a reference point when the new engine mounts are installed please? eg - space between a subframe or crossmemebr and lower sump pan. So we can check the health or sag of existing engine mounts by comparing the measurement of fresh new mounts- just a suggestion.

Also - how did you support the engine etc? I have read the subframe has to drop to get at these. Any pics of how you got to these would be awesome. I fear I will be doing this task soon also.
 

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2005 S600
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Discussion Starter #3
My engine support is not as elegant as I would like. I have a brace/transverse engine support. Rests on the fenders. Works great on my Volvo’s.

But the hoist point on this engine is too far forward, and the transverse brace would be sitting on the headlights.

So, I’ve got a very thick (rigid) wood block, made of 2x8 (planed down to 7” so they’re very flat) which is 4 1/2” thick, 7” deep, and about 12” long.

It just fits between the subframe rails but covers the entire sump. It’s thick, flat, and quite rigid, so the load is spread evenly across the sump. I would not be comfortable with a single thickness block.

Here is my transverse mount, shown in its storage location, followed by a picture of the engine support as I’ve got it:

EC78C8A7-3489-426D-BC9B-2EFBC82C2143.jpeg
B458B60F-CD65-4AE6-B5D8-14C3D317E041.jpeg


Hope this helps.

Engine mount plate shown here in the gap between subframe and front frame:

2605585
 

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2005 S600
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Discussion Starter #4
2605586

Also, I said I was replacing the compression bypass valves.

New one next to old one.

The old ones weren’t bad at all. Glad to have it done, but they were in better shape than I imagined.
 

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2005 S600
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Discussion Starter #5
I was doing several things, as mentioned, when doing the engine mounts.

All of this work was because I blew the high pressure/damper hose and lost all the fluid on my way to the airport a while back.

As I look at this casualty - part 220 320 59 72 installed in June 2016 - I can’t help but wonder if the collapsed mounts were causes of the hose failure.

Look how the hose jacket is damaged. Like it was pinched between subframe and bracket.

Hmmm...

If it was rubbing on the subframe, and pulling/straining as the engine moved, I could see that causing the swaging to fail.

So, when I get I buttoned back up, I’ll measure engine clearance.

Of critical interest to me: how much clearance between that hose, the subframe, and the bracket.

2605591
F7825F61-8135-464C-A4F5-FAAA57FDF228.jpeg
 

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2007 E220CDI, 1990 300E-24V, 1987 W124 3.6 AMG build 1993 E500 W124, 94 320CE, 1997 W140 S280
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Hi, to ask a silly question could you feel the vibrations of the bad mounts through the car? And was it worse hot or cold? Any strange noises too?

I ask this as even though I fixed the actual misfire my S600 sometimes feels shaky at idle. I think the engine mounts may be bad.

Have you got it back together yet - does it feel really smooth now? :)
 

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It’s very easy to test for worn engine mounts . With the hood up , sit in the drivers seat and place the car in drive , looking at the top of the engine through the slit in the windshield

Now firmly press both the brake and gas. If the motor rocks significantly when you quickly step on and off the gas the motor mounts are worn out
 

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2007 E220CDI, 1990 300E-24V, 1987 W124 3.6 AMG build 1993 E500 W124, 94 320CE, 1997 W140 S280
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My engine support is not as elegant as I would like. I have a brace/transverse engine support. Rests on the fenders. Works great on my Volvo’s.

But the hoist point on this engine is too far forward, and the transverse brace would be sitting on the headlights.

So, I’ve got a very thick (rigid) wood block, made of 2x8 (planed down to 7” so they’re very flat) which is 4 1/2” thick, 7” deep, and about 12” long.

It just fits between the subframe rails but covers the entire sump. It’s thick, flat, and quite rigid, so the load is spread evenly across the sump. I would not be comfortable with a single thickness block.

Here is my transverse mount, shown in its storage location, followed by a picture of the engine support as I’ve got it:

View attachment 2605583 View attachment 2605584

Hope this helps.

Engine mount plate shown here in the gap between subframe and front frame:

View attachment 2605585
Astro - since you appear to have the late style engine mount brackets can you tell me what all you had to remove to replace them please? For example did you have to remove the steering rack or lower the subframe at all?
 

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View attachment 2605586
Also, I said I was replacing the compression bypass valves.

New one next to old one.

The old ones weren’t bad at all. Glad to have it done, but they were in better shape than I imagined.
For the diverter valve part number A2750960002 how many do you have to order? 1 kit or 2? I can't find any pics of the kits online
 

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2005 S600
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Discussion Starter #10
You need two diverter kits. One for each side.

To replace the mounts, you need to either: lower the subframe

or remove the entire exhaust....subframe looks easier.

You’ll need a good set of torx sockets and a jointed extension.

Here is the damaged hose. Note the damage to the casing on the right side, on the curve.

This is where I think the subframe pinched it.
2607321


new hose installed. Looks much better for clearance than it did when I took the old hose out.

2607322


here is an idea of how much clearance there is now.

2607323
 

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2005 S600
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Discussion Starter #11
Also, the noise I previously had was a faint “whine” that varied with engine RPM and was most noticeable at 2,000 RPM.

Same noise that you would get from a blown accumulator/pulse dampener on the pressure regulator.

It’s completely gone now.

My working hypothesis is that the pinched hose transmitted the vibration/noise through the subframe into the cabin.
 

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2007 E220CDI, 1990 300E-24V, 1987 W124 3.6 AMG build 1993 E500 W124, 94 320CE, 1997 W140 S280
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FYI I tried to order 2x diverter valve kits today. My dealer said they are not available at present. I was able to order them as they are factory back order so no telling when they will actually turn up. Could be next year. That sucks I'll have to take all apart again to replace them
 

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2005 S600
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Discussion Starter #13
You might try FCP Euro. They might have them.

If not, don’t worry about them. Mine were fine at 100,000.
 

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2007 E220CDI, 1990 300E-24V, 1987 W124 3.6 AMG build 1993 E500 W124, 94 320CE, 1997 W140 S280
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You might try FCP Euro. They might have them.

If not, don’t worry about them. Mine were fine at 100,000.
I am in Ireland so unfortunately I cant use FCP Euro etc.

I did get the Lemforder engine mounts today. Still at work so I'll take a closer look when I get home.
 

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2007 E220CDI, 1990 300E-24V, 1987 W124 3.6 AMG build 1993 E500 W124, 94 320CE, 1997 W140 S280
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Astro- do you still have your engine mount boxes? Does it state a country of origin? Or do you recall what the box said? Germany, Turkey etc...
 

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2007 E220CDI, 1990 300E-24V, 1987 W124 3.6 AMG build 1993 E500 W124, 94 320CE, 1997 W140 S280
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The Lemforder mounts are made in Germany and you can see where they ground off the MB markings. :)

20191014_174654.jpg
20191014_174739.jpg
20191014_174747.jpg
20191014_174808.jpg
 

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2005 S600
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Discussion Starter #17
I’ve got the boxes, but can’t check for a while.

Your Lemforder mounts look good.

You’re all set.
 

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S500 W220 SLK320 R170 C200 CDI W203 Peugeot Expert Van
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Hi,

I am glad for this thread, I was chewing over Febi Bilstein or Lemfoerder Mounts for when the M113 V8 gets shoehorned into my V6 R170, now I am certain ....................

Lemfoerder :D
 

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'94 E500 (sold), '05 S55, '08 G55
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31 Posts
My usual sources for after-market parts (Pelican, AutoHausAZ, RockAuto, etc.) are not showing any availability for the Lemfoerder M113k motor mounts. However, www.mboemparts.com is showing OE mounts priced at US$125/each.
 

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Registered
2007 E220CDI, 1990 300E-24V, 1987 W124 3.6 AMG build 1993 E500 W124, 94 320CE, 1997 W140 S280
Joined
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1,299 Posts
My usual sources for after-market parts (Pelican, AutoHausAZ, RockAuto, etc.) are not showing any availability for the Lemfoerder M113k motor mounts. However, www.mboemparts.com is showing OE mounts priced at US$125/each.
125 each sounds a little pricey? My Lemforder M275 mounts were £45gbp each from AutoDoc.co.uk
 
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