Transmission leaking fluid
My wife parked her 2003 CLK 320 in the garage. She was about 80 miles from our house visiting, and when she left their house, called and said the car was staying in third gear and not up-shifting. I had her tap the gear selector to the right and it went to a higher gear. When she moved the car this morning, the garage floor was covered in trans fluid. The mechanic said the fluid that was still in the trans was clear, indicating no bands were burning. The computer readings did not indicate any issues. We had the transmission serviced three months ago. There are 23,000 miles on the 12 year old car. The mechanic said it appears to have overheated. He is back flushing the trans cooler, and will flush the entire trans again. It is not the torque convertor or seals or gaskets leaking. Any ideas? The transmission is and was not slipping prior to this. As you can tell the car had not been driven much before we got it 6 months ago.