Not if it is an ATF leak David.
If the motor oil level is unchanged but the ATF level is low, sounds like the tranny cooler in the radiator may have sprung a leak. This is something you need to remedy ASAP as anything other than ATF in your tranny will result in an expensive repair bill. You can pull the radiator and have it pressure checked (both coolant and tranny cooler sections). This may not be repairable (not sure due to the plastics) and you may just have to get a new radiator.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.