The up and down adjustment is very easy to do. On the back of the lens is a silver metal disc with a small hex head. Use the right size wrench or even just pliers to turn it and you'll see the light pattern move on a wall with just a small turn. There's a Y shaped notch there also that you can use a certain size phillips head to turn the same part. In Fig. 6 below you can see the notch and the teeth on the disc for a phillips head. The hex is just out of view on the back side toward the engine. I've found that the drivers side needs to be a bit lower than the pass side to avoid getting flashed by other vehicles. I've never had to do the sideways adjust.
Here's how the dealers do it-
Mark Griffin
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