Hello I will help you with your question,
If you can spread mothballs around the vehicles parking (better if it is covered) and place a couple in the corners of your engine compartment that will keep the squirrels at bay. They can do some serious damage.
I know this is a touchy subject with neighbors but someone has to have a serious talk with the feeder. It is not good for the squirrels and as you know they do damage to vehicles and the buildings.
Let me know how I can help you