W221 New engine mounts needed?

[Slartibartfast]

I've heard that to check the conditions of your car's engine mounts: put in Drive with foot on the brake and rev. I've done this but don't know how to tell if the engine mounts are OK. Does this look like all's well?

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[zipdip]

Well the engine is moving a fair bit suggest you do get the mounts changed

 

[pillow]

Looks ok to me. The mounts are fluid filled rubber so they will flex some.

Here is what mine looked like when the left mount was totally shot:

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[JazzCL63]

Might be a bit if work. But you can jack up the vehicle remove the cover and check if the mounts have leaked also. But as I said it might be alot of work and maybe easier to just get it checked. Also check if you have any vibration in the steering wheel when stationary and engine idling

 

[alecmascot]

The quick and easy test is to compare the vibration felt in the centre console between P/N and D/R.
If there is a noticeable difference then the mounts are on their way out.

 

[FinanceBro]

I found it easy to diagnose holding the brakes slightly, almost letting the car go. I had a serious vibration on my W216 with an M273 engine. Since then I’ve replaced both engine and gearbox mounts. The thing that was not obvious to me is that the engine flexes MORE with new mounts than with old ones, which was counterintuitive to me. The idea is that new mounts have oil and all the dampening stuff inside, which lets the engine flex slightly, but the mounts are reducing all of that vibration to pass onto the body. While old ones had an oil leak, which made them brick-sturdy, and that made the body vibrate most.
Obviously when I say flex, that does not mean the engine jumping out of the engine bay, but definitely there was noticeably more engine movement after the service was done.