On the heater controls - some, but not all, cars have the option of using outside or inside air for the heating and ventilation system. Many people are not aware of this. The normal selection is "outside air" - use this unless it's smokey, or smoggy outside, or for some reason you really want to recirculate the inside air.

Warning Lights - well we're sure everyone knows they're there for a reason - a good reason, but you'd be surprised how often people ignore them, or ESPECIALLY . . . .they make up a reason in their mind why the warning light isn't important. Worst case I've seen was on an older Honda with the Brake Warning Light on - the guy said "Oh, that's just for the parking brake light switch" .....Upon inspection it was revealed that the car had about one-eighth inch of filthy black brake fluid in the bottom of the brake reservoir ( ! ) EXACTLY what the brake warning light was trying to warn the driver about. It was clearly explained on page 19 of the owner's manual. Luckily they brought the car in for some service. AND ....the drivers of such a car are not the only people that could get hurt ....they could kill you,or me, too.

EXCESSIVE ELECTRICAL LOAD - if it's really necessary, you can operate the heater fan on high, the wipers, the heated back window, and the high beam headlights all at once....but starting the car with all those on is just asking for trouble....at least it's rough on the battery. Particularily if there is some electrical concern on the car, like weak starting, a warning light on, dim head lights, etc. .....it pays to be conscious of what electrical systems are on. Some people would leave the heated back window on all year....never knowing the drain on the sytem that creates. More modern cars turn off the heated back window after a while, or at least every time the car is turned off.

Most people know that if the headlights are pointed up into the trees, or down on the ground, they can be adjusted. I did run into a person who thought that you just accepted wherever the headlights were pointed....didn't know they could be adjusted for proper illumination of the roadway.

Some people never use HIGH BEAMS on the darkest of nights, when they're the only car on the road.

"SRS" stands for 'Supplemental Restraint System" - i.e. Air Bags - if that light is on, it means your Air Bag/s ain't workin' probably.