Storage

Cover up every single entry point into the cabin and engine with wire mesh to keep the rats out. Rats got into my car several years ago and ate the plastic steering wheel.

Change the fluids, adding appropriate fuel stabiliser and cylinder lube through the plug holes, as instructed by the product information. Block all holes, such as exhaust, inlet etc. Remove battery, wheels and tyres and use a removable rust preventative on discs etc. Make it rodent proof by blocking air vents etc. Bait the surrounding area with rat poison, being careful to protect it from children and cats, on a regular basis. Put it away dry and make sure there is some ventilation. Best to keep it in a dark place for the sake of rubber bits.

You will need to do some preparation before taking it out of storage too.

Huw

...and they can cause havoc on wiring clusters. Some got into a car a friend parked behind my shop and paid no attention to warnings. When he came to get it finally, he raised the hood and saw what they had been eating through the winter!!! s

In addition to everything everyone else said, I would put the car up on blocks, too. Putting extra oil in the crankcase (to prevent rust) is a good idea, too, in my opinion, as is storing it with a full gas tank (it can't rust that way).