Some things you should always try to fix yourself: your squeaky door, your bikini line, your awkward smile that creeps everyone out. But when it comes to your car, you better know what you're doing, because you're not only taking your life into your hands, you're also embarrassing the heck out of your friend in the passenger seat. Heed these examples.

Air Conditioning:

Antenna:

Battery:

Body Work:

Bumper:

CD Player:

Doors:

Door Handles:

Headlights:

Hood Ornament:

Ignition:

Lock:

Mirror:

Passenger Seat:

Steering Wheel:

Tires:

Trunk:

Undercarriage:

Window:

Windshield Wipers: