Battery - A fully charged battery should measure about 12.3 to 13.2 volts with your engine off. The capacity of a battery drops as the temperature drops. The two main ratings on a battery are cold cranking amps and reserve capacity. There are still some battery types that require adding water. Brake Master Cylinder - Check the brake fluid on the tank on top of the master cylinder.
Many auto makers recommend changing the brake fluid at regular periods.
Type 4 is a higher performance and should substitute for type 3. There are other types, in any case, check with your owners manual for the proper type. Coolant in the radiator should be checked when the engine is cool. Normally coolant is checked at the coolant recovery tank. Shown is the radiator cap, which should be checked to be clean and free of deposits.