Yeah an friend of mine (God rest his soul) was a MB mechanic for many years and he was telling a mutual friend one day about the problem. Anyway about a week ago I called the MB dealership and talked to the parts guy and said I needed a new key for an 83 240D. He ask me a couple of questions as to what the switch was doing and when he did I suddenly remember what my buddy said. I didn't drive the Benz again till the key cylinder arrived in the mail.
