First off, if you had any hint of how few miles makers of automobiles considered normal life for springs you would faint. I am going to be conservative and say ' less than 100,000 miles' .... although what I had read 30 years ago was almost half that.

There will be specs for four places on the underside of your car which are meant to be used on a flat pad to determine if your car is sitting at the right height.

Some honest/good front end alignment places have those specs and will refuse to align the car if they don't meet them because they know they can not set the alignment properly until the car is at the correct height... but these days few are that honest and/or knowledgeable.

Those specs should be in one of the two ' 123 chassis manuals '.

A good 'spring shop' may also have specs for the proper lenght the springs should be after rearching... but that is clearly in the 123 chassis manual also..and I have posted pictures of that chart in the past. At least for the wagon if my memory serves...

The MB springs are even more prone to needing rearching or replacement than normal springs because they used more smaller wire and more coils to get the luxury ride for the same amount of weight. This is the reason you need a special spring puller to get them out... very closely spaced coils.

In other words, New springs, or rearched springs are the answer... however, MB new spring cost is comparatively low.... so I would opt for new springs...

Then you can look to see if the associated rubber needs to be tweaked to make it sit level. But remember, unless you have Self Leveling on your car you have to choose for ' level' at a certain weight of load inside the car.... including the trunk.