Servus together! on the manual gearbox of my 208d from 1993 with 230T KM stands at the filling screw SAE80 and thus this or better a 75W-80 should be filled. Gear transmission is a 5speed 711,110. This year the transmission (or maybe I too) sometimes worked a little bad so that I switched off about 5 times and the gears with gear collars. On the bill of a MB workshop that changed the gear oil before approx. 80T KM stood “gear oil ATF” and thus f I recently enveloped the LM1200 ATF. About the 200KM driven so far, the gearbox turned clean and soft. But as I learned the ATF is definitely the wrong OIL!!!!! On the magnet of the drain screw it looked like this, see picture. Very fine abrasion with a few pieces 1-2,5 mm large which look like tooth flanks. Can you explain to me what an ATF oil does wrong in my gearbox? Why does an ATF come in in most 711 gears? Thanks in advance.