I went to Germany last week to purchase it and drove it all the way down to Portugal! And am now here to enjoy some sun

Unfortunately the caravan did not come with a user manual the other owner had lost it. Can anyone tell me where I can download one or if anyone has one can you please send it to me?
I own a Mercedes Westfalia James Cook 309D from 1988.
The manual can be in german because ich verstehe in bischen deutsch ahah
Thanks in advance,
Best regards,