Are your engine mounts collapsing?
To check hydraulic engine mounts, you can look visually at them to see if they are so bad as to be obviously collapsed. This is the extreme case, however.

Another way to check is to look at the small rubber block that is located on the engine subframe under the oil pan. A new set of mounts will have a clearance of about half an inch to as much as 3/4". Old mounts may have some clearance, but you'll be able to see where they've been bottoming out on the rubber bumper pad. Mounts that are completely deflated will allow the engine oil pan to sit firmly on the rubber bumper.

A quick-check method on hydraulic mounts: if the frame pad under the pan shows any sign of rubbing and there is less that 3/8" clearance, the mounts are collapsed. Any abnormal engine vibration may be attributed to a collapsed mount. Another clue is if the fan blade is off center in the fan shroud -- check the tips of the fan blades for scoring.

Make very sure to get only the German-made replacement mounts. There are some generic replacements that look the same, but are filled with rubber instead of oil. These will make the car vibrate worse.