hi, 1990 300e about 180,000 miles.

bought the car a few weeks ago w/ transmission problem. It would rev up and slip and sometimes not engage next gear. Checked the ATF, it was low. Added 2 qts and all was good. Transmission shifted a little harsh, but no slipping and no sticking in one gear. Also engaged in reverse muuuuch quicker.

So after about 60 miles or so the slipping and sticking came back. Added another 2 qts and life was good.

I've had to add ATF every 60-75 miles. I've probably added 8-10 qts, which I assume is more than it holds, so all the fluid in the system should be new fluid.

My problem is that I can't figure where it's leaking. It's not leaving any wet spots under the car and everything else under there is bone dry. Seems like a lot of fluid to loose so quickly w/ no traces....

Where is my ATF going?