Polo 6N transmission

Hello community,

I and my girlfriend drive a Polo 6 N, EZ 12/1995, now 169 000 km.

The following abnormalities:

1.) For some time now he has lost some oil at the input of the switch bolt into the gearbox, the shaft sealing ring is probably ripe for replacement.

2.) According to e.g. B. ==References====External links== Gear without switching is unusually difficult to switch gears 1-4.

Question:

Can it be that there is already too little gear oil in it and how can I check it for quick?

I am grateful for every hint and every assessment, because I have a little lack of time at the moment and I don't even come to the workshop during the usual opening hours.

Have a nice weekend!