The previous owner changed out the key-lock, possibly (probably) because of oil in the shutoff valve right behind the lock set. When I was working on the radio and the ACC which were having problems, found oil had traveled down via the cabled wires and had soaked a lot of the items in the center of the console. No evidence of any current leaks or new oil, just a mess that had not been cleaned up adequately by the PO.

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1961 190Db retired
1968 220D/8 325,000
1983 300D 164,150