Hi. I just joined today. I have been fixing up a 1976 240D w115 with the 4cylinder engine. I picked it up last fall with many issues. She is running and driving very nice now. I was driving down the interstate a few days ago and a part fell off of the engine. It seems to have been the timing pointer (at the harmonic balancer) and the threaded cap as well. There may have been more to it as I don't remember exactly what was there. I believe there may have been a bolt or pin underneath which held half of the inner timing chain guide as well. I'm not totally sure if that is gone or not but I will try to find out more when I get home. The car lost about a quart of oil out of the hole as well but nothing too serious. If anyone can help me figure out exactly what is missing and how to get it I would really appreciate it. Thank you! Matthew