Hi,
I have a 1984 300D that recently developed a problem with the ignition. Frequently, the key won't turn out of position 0. As soon as the problem began, I ordered a new key (cut to code) and installed a new tumbler set. This seemed to fix the problem for a day or two, but now the problem has returned. Perhaps coincidentally, I have also been having problems with the battery. I have had to recharge it twice recently.
Any advice on what to check next?
thanks, Carl