Difficulty - Easy
Time - About 10 minutes per side
Tools - Small screwdriver, clear or black silicone
Introduction
There is a small access cover under each door mirror which is invariably not a tight fit and will cause quite a considerable amount of rattling at various speeds or wind conditions. The fix is easy and involves adding a small amount of silicone to the cover.
Procedure
This is the cover under the mirror. If you tap it you will find it loose and rattles.
Use a small screwdriver to pop off the cover. Sometimes only one side rattles but while you are doing that you might as well do the other! Take care not to damage the paint or stick that screwdriver in yourself.
Take the covers to the bench and apply 3 small beads of silicone to the cover as shown. Do not apply a full bead as you will stop water draining from the mirror and make future removal of the covers extremely difficult.
Now go back and pop the covers back into their housing. The car can be driven immediately.