i just had my s550 lowered, but it seems like the right side is lower than the left side by half to an inch, is that common? i dont know how they lowered it but not with lowering module

 

Mine is similar also, not noticable when driving. I had my wife drive while looking from outside. I know you can have star disnostic fine tune the height.

 

Did they use lower links? If they did you have to get them to re adjust it.

 

Depends if the car is equipted w/abc if not than there is only 1 link for the rear.

 

Is it the left front or left rear? Make sure they used links in the front and that it's done correctly. Other way folks do it is by drilling the strut - really bad idea...

Do you have the ABC or Airmatic? Airmatic has a tendency to be a little bit uneven on the rear since there is a single adjustment.

 

This is actually fairly common in the rear ,if you would have measured your heights before lowering, you probably would have had similar results. My car was 1/2 off with airmatic

If in the front, they didnt adjust the links or star settings to match. You can do the links yourself

 

the left back and front is higher than the right front and back. i think he might have drilled the strut but not too sure... why is drilling the struts bad?

 

I lowered many of them and they all seat the same way for driver weight distribution once the car is driving it evens it out