AFAIK the engine mounts for a 16v are the same as those used in the W124 chassis. and yes, they are hydraulic.
if you just re&re'd the mounts you should experience a drop in engine noise and vibration as I did when a replaced mine this past spring. if you're experiencing vibrations then you may want to double check the mounts and also see if there is anywhyere that the engine components might be making contact with the chassis.