In reply to Kimono:
Having spent my whole life working in different countries, I often leave cars in one place for quite a few months. There are only a few precautions I take:
- Leave the vehicle with the fuel tank practically full. This stems from my experience of leaving a jeep in Arabia near the sea with a nearly empty tank. The tank rusted on the inside, causing endless problems with the carburettor. I had to replace the tank.
- Make sure that all perishable rubbish has been thrown out
- Make sure that everything electrical in the car is really turned off, including CD players etc
- Have a spare battery charged up. I like to keep portable batteries in my cars, with built in jump leads, because they are so much quicker to use than jump leads. Often when I return to a car after a few months the car battery is dead, but the portable battery has never left me down. (If it did, it would be very easy to charge.)
When I return to a car that has been left, I:
- Hose the car down because it has usually collected a lot of dust, even if left in a garage. Cars that have been left outside seem to be a natural magnet for bird droppings and tree resin.
- Start the car up and leave it running to charge up the battery. I usually do this whilst hosing the car down.
- Check the expiry dates on road tax and annual test (what the Americans call a "brake tag"). Tempus fugit.
- Check that all the lights are working. On one of my recent trips to the US, I forgot to do this and got stopped by the police on the first night I was back because one of my rear lights was not working. I was made to "walk the line" at gun-point, which was not a fun experience
- Check the radiator and washer-water levels - the latter can often evaporate away. It is useful to have plenty of washer fluid in the car when you take it for the first drive, so as to be able to clean the front and rear windows thoroughly with the wipers.
- Check the tire pressures. I do this simply by pressing the tires very hard with a thumb.
- Take the car for a drive to check it and also charge up the battery further. (I usually combine this with a trip to the local shop to get essential groceries.) Often the brakes make dragging and scraping noises until they have been used a bit. If the car has a remote key, that may require a new battery - and one might as well replace that straight away.
I do these things immediately upon my return. I leave the car outside the house with the engine running whilst I go into the house and throw out the dead roaches (I call this the "roach count") and run all the taps and flush the toilets. After that, the house and car are pretty much "ready to go".