We all have different levels of tolerance for these sort of drip problems. My tolerance is fairly high because I have a drip pan on the floor of the garage to catch the drippings - and I have measurable transmission fluid loss, even when just parked. It probably needs to have a pint every 3000 miles added. (That's the '82 300D.)

I have to suggest not using any kind of transmission additive that is supposed to "repair" the transmission. I had a pickup truck with a failing, leaking transmission and tried some of the stuff. It caused the transmission to completely fail within 500 miles.

If I had your car, I'd get the drip pan on the floor. If parked in the driveway, I'm not sure what is reasonable to do for leaks. But I'd just drive the car.

Ken300D
'82
'87