Well, your rear tires are tilting in most likely due to soft rear springs. During normal operation the rear wheels tilt in and out as the rear suspensioin travels up and down. The wheels move in an arc, so to speak. When the rear springs start to sag, the rear wheels are forced upward causing to tops of the rear wheels to tilt in. This occurance is normal, but due to tired springs. My 300D is getting new springs, when rear springs are replaced the rear alignment will return probably close to the original settings. The same applies to the front, just not as drastic as the rears. a quick and painless way to check to see if the rear springs are indeed tired, run your car low on fuel, take a tape measure and measure the center of the rear wheel opening from the highest point to the ground, and measure again when you are done. There is no set spec, but my car drops about an inch and a half, due to the springs not being able to handle much weight anymore.

I would ask if they have those two items, the only place you may find them are at a MB dealer that has an alignment machine, or a very high end tire shop. There isn't anyplace around here where I am that has one, I eyeballed my front toe adjust when I did mine on our machine at work.

Call around!