DCM91112

Hey fellas, I was on a Mercedes part site and noticed a lot of the suspension springs from the CLS and AMG W213 springs would fit a base model e300 as far as part fitment. But it also bases fitment on the paint markings on the springs. My question is there anyway to find out what the paint markings mean? I've googled but can't really find info specific on the w213 chassis. I'm looking into this to try and find a set of OEM rear springs that would lower my rear a bit but still keep the ride complaint with the front springs.