Hey gang. Just wanted you to know that I have fixed the tach cable leak and the car doesn't leak onto my foot anymore (geez, that was hard to take). The parts were obtained from the local Mercedes dealer for about 12.00 and installed in a couple of hours. It took me a minute to figure out how to remove the old seal (1/2 drill bit, low speed, till it grabbed and spun it out of the housing). All is good there. Any comments on running a high detergent motor oil in this engine? I have a stuck oil ring that is causing some blow-by. Also, I looked for the engine number and also had Will Samples look with me and it is a blank plate. Will says that this means it was a replacement block directly from Mercedes. Looks like a 280. By the way, Will Samples is a class guy that is working on some amazing cars with customers in Spain and Germany and still found some time to tutor me on some points. His quality of work and trustworthiness are immediately evident upon entering his shop and speaking with him. Thank you all for the help on the tach cable.