Originally Posted by scottmcphee

You forgot the string method, you'll need a string, a ruler, wrenches for tie rods, and I use jack stands to hold the string up at the right height.

Do one side at a time:

Car on a level floor, steering wheel straight (no matter what the wheels are doing), pull a string the length of the whole car leveled to center hub height. Mercedes are great for this because the tri-star logo on the hub gives you a bullseye for center hub.

Move the string away from the hub so it is same distance front and rear, say 2" from the string to the bullseye. This is your "laser line". Now, wherever the string passes a rim (twice on the rear and twice on the front), adjust the wheel to make rim-to-string distances the same for that wheel. Do this by turning the tie rods until it is so. When that happens you have zero toe on that wheel. Tighten tie rod in that position, move on to next wheel.

Having some dusty dirt under the wheel makes it easier to move the wheel by turing the tie rod, yes you can do this by reaching in from behind the front wheels with a wrench, lay on the ground.