Let's talk about deciphering the auto service menu board. First remember that all of these services are recommended by vehicle manufacturers. They set how often or at how many miles the service should be done. [youtube _dWpY6T5pJ8] Air conditioning service involves purging the old refrigerant and capturing it for proper disposal. Then fresh refrigerant is installed. The fresh refrigerant will lubricate the system and will also help it cool better. Alignment. Service centers like D&H Enterprises make sure all four wheels are lined up and track with each other. This reduces tire and suspension wear and improves safety and handling. Battery service. Service centers like D&H Enterprises inspect the battery for corrosion, leaks or damage. Test the battery's ability to hold a charge. If the battery's still strong, clean it up. If not, replace it. Brake service. This could be two things. A brake inspection to see if the brakes are working well mechanically and to see if the pads are still safe. If not, replace the pads and make any repairs that might be in order. The other thing is to evacuate the brake fluid, clean out the system and replace it with fresh fluid. This is important, but often over looked. Cabin air filter. The cabin air filter is the filter that cleans the air that comes into the passenger compartment. It works like the filter on your furnace at home. It gets dirty and needs to be changed often. Cooling system. This is the cooling system for your engine. Replace the old coolant with fresh to protect your radiator and other cooling system components from corrosion. Differential service. Every vehicle has at least one differential. They don't require service very often, so people don't think of them much. The differential transfers power from the drive train to your wheels. Drain the old fluid and add fresh lubricant. Engine air filter. This filters the air that's burned in the engine. It also gets dirty and needs to be replaced often. Fuel filter. This filter cleans the fuel before it gets to the engine. Like the other filters, it too gets clogged and needs to be replaced in order to maintain good flow. Feel free at any time to give D&H Enterprises a call at (925) 356-0683 to learn of the many services we offer, or stop by our Concord, CA auto center at 2689 Monument Blvd. 94520.