Td4 Automatik no reverse gear

Hi.
Im New here and i life in Spain. My Name is André.

I have a serious problem.
Suddenly we no longer have any reverse gear.
Go all 5 forward gears and you can also do sport manually.

I noticed. What happens when I go to R. The station wagon says R and you can feel a slight push.
If I go to about 2000 revolutions while standing. Switch from N or P to R, the speed drops to about 1000. But nothing moves.

Error stored P1605 and P1815.

Not more.
Does anyone have any advice ???
The plugs are clean and also tightly together.
Mfg Andre

It's most likely the reverse gear brake band that has worn out or broken, which is a common issue on this particular transmission.

This fault can also happen if the wrong bolt is removed when changing the box fluid, but if no work has been done on the gearbox, then the brake band has failed, and needs replacing.