Jack up your engine a bit more to fully clear the motor mounts. Be sure to watch that you do not jack the engine up too high - watch that you do not crimp any heater lines or other items on the firewall behind the engine.

Remove the mounts along with the heat shield.

Place the heat shield on top of the new mounts before re-installing them.

While you have your mounts out and the engine jacked up consider replacing your engine shocks if you feel they may be worn. These jobs are best done together instead of one at a time. Click here to see a guide on replacing the engine shocks on a non-turbo W123; the general concept applies to turbo cars though the shock mounts are different.