Kaiser,

I can look for answers in my EPC but I need to know the year of your car or the 6 first digits of the serial number ( W 124 XXX ).
There are 4 mounts when you take the 2 engine mounts into account.
Are the mounts used or are the transmission mounts eaten up by oil ? This happens regularly when there is/was an oil leak on the engine or the tranny.
In that case the flex coupling would be damaged too! Check it out.
Do a search about the engine mounts on this or the Diesel forum.
This will allow you to diagnose yourself if they have to be replaced or not.

Danny