car shakes when stopped

my 99 sl1 starts fine, but when i am stopped at a red light or stop sign my car shake like crazy. could it be that i need motor mounts?

So much sake would be normal, especially when the milage increases but excessive shaking can have a number of reasons, a bad mount just being one. You could have a engine miss, vacuum leak or some other meachanical/electrical issue. Some of these problems result in lower than normal idol speed which will translate into vibration, especially through the steering column.

Try putting it in Neutral

its the motor mounts