I have noticed that on the front near side suspension turret of my w211, by the windscreen washer I have a small brass air fitting. there isn't one of the offside and I don't have airmatic. I will try to post a pic tomorrow.
W210 E-class rust buckets-front suspension turret collapse
I remember seeing a photo in a German magazine a while back showing rust that can
often be seen in the front top turret that holds the springs. Here are some photos from America
that show what will happen to W210's as they get a bit...