400E sagging front end

[GlenzBenz]

My 400E has 150k miles, and from what I know all of the major front end parts are original. I've noticed that the passenger side is about 1.25" lower than the driver's side in the front. The car tracks straight and tires seem to wear fine over the 2 years I've owned it. What could be causing the sag on one side. I was thinking of putting in new struts anyway, and figure that if it's already apart, I'd address the sag. My indie mechanic seems to thing the coils springs are at fault. If so, where is a good source to buy them? If I replace the fronts, do I have to replace the rears as well? I'm sure the rear springs have compressed a bit in 22 years... I don't want to have the front end too high relative to the old rear springs.

Also, I'm finding that the only source for OEM height springs are from MB. $$$! Are there any aftermarket options that don't lower the car? I was also wondering if I could just put in a thicker spring bed or shim on the passenger side and not replace the springs at all. Just do the struts and a few bushings that need it and be done... Any thoughts?


Thanks!

Glen