Hi John,<br> <br> I had intermittent starting problems that cropped up with the previous owner of my '85 300tdt. The problems occurred almost exclusively following a long drive (as opposed to around town short stuff) and consisted of the clicking sound you describe. If I waited a few minutes, it would start up fine as if nothing was wrong. The PO had replaced the ignition switch in an attempt to correct this and provided me with a rebuilt Bosch starter on the theory that it was a solenoid-related issue. I had the new starter installed and the problem still persisted. I then had all related grounds checked and tightened, which seems to have alleviated the problem - for the 2 or 3 weeks since. I don't know if you're experiencing similar simptoms, but take a good look at the electrical grounds. Hope this helps.<br> <br> Cheers,<br> <br> Joel