SCHALTPROBLEME mainly from 1st in 2nd gear and in reverse gear – Laguna Phase 1 K 56

Hello,have my Laguna Grandtour Phase 1 (.1), K 56, RT with 1.8 liter engine, 66 kW and 5-speed circuit can no longer use and now it does the following problems. As soon as the engine / the transmission is reasonably warm (cold I could still understand because of viscous transmission oil, but we don’t have winter), it is difficult sometimes not to insert the 2nd gear. With the backward gear it is not quite that bad. I – the footmat pulled back, which is not. Abe r somehow I have the feeling, I have to reposition the coupling (he has 117 Tkm). I really have to take care of the backward passage and switch very slowly and in all cases push the coupling very well and hit it exactly. On the 2nd it does not help. It helps if necessary to press the switch lever in the direction of the gear and let the clutch pedal come easily. But somehow all the passages do something and don’t flood so properly. I have in the front of the motor on the driver side over / next to the wheelhouse near the spray wall the already frequently described black “drum part” with pay, but do not understand how I should turn the thing, if it is meant for the clutch adjustment or where I should hold, if I turn. Either I am too stupid or you have to turn much further than I did it or….?? Would be nice to get some tips. In advance many thanks. Fatherfin