Backed out of a parking spot, pulled forward and realized that a car was blocking my path, put it in reverse and backed up, dropped it into drive...and boom, NO GO. 268,000 miles on 1990 300E. Recently serviced with new fluid (checked it, it's topped off) and filter and has been without issues. I'm wondering if there may be a linkage problem or hopefully something that's not going to be a major pain in the a$$. I'm out of town on business and planning on having it towed tomorrow to a local shop that was recommended, but one that I have absolutely no prior experience with. Any suggestions as to what the issue may be? Linkage? After 268,000, is it cooked? HELP!!!