I had a problem with my '87 560sl, drove to Royal European Motors at 19130 W. Dixie Highway, father and son operation, super honest and friendly people.
I had an idea of what the problem was but I let then look for it to see what happen, Robi came back and hit it right on, change a relay, since I was there change of oil, and I was on my way in about 2 hours. I'll be back for A/C repairs.