My 1990 Baby Benz 190E (2.6) was running perfectly. I came to a stop at a stop sign, and when I went to pull away, the engine reved, but the car wouldn't move forward. It was like the shift had been bumped into neutral. I could get it to go in reverse, but not forward. I had to back into a driveway, and have the car towed to the shop. The mechanic says "something broke inside" and wants to sell me a new transmission. I find this hard to believe because, prior to this, the transmission behaved and shifted perfectly. There was never any slippage. The fluid doesn't smell burned. There were no noises to suggest that "something broke." If I need a new tranny, so be it, but I think this has to be something relatively simply like a broken vaccuum line or electronic sensor. Any trouble shooting advice will be greatly appreciated. Thanks.