Avoid contact with corrosive deposits and battery acid. Wear eye protection and rubber gloves. To prevent scratching, never use a dry rag. Your vehicle should be placed on a lift and the exhaust system examined for leaks. The trunk and floor boards should be inspected for small holes.
Exhaust fumes can be deadly.
Cold weather will only make existing problems worse. Tires Worn tires will be of little use in winter weather. Check tire pressures once a month. Rotate as recommended. Don't forget your spare, and be sure the jack is in good condition.