I have seen many auctions for Instructions to certain Playmobil Sets; specifically, the older, vintage and retired sets such as the Playmobil Victorian Mansion (5300); the Large King's Castle (3666); and many others.
The fact is...if you have purchased an older (or newer) set from eBay or any auction site with NO Assembly Information, simply go to Playmobil.com, choose your Country, scroll down the left side of the page and at the very end of the list you will find Assembly Instructions. If you click on it, it will ask you for the set or item number. Type in the number and the instruction manual will be available for download.
Hopefully this will be of some help to those who have purchased vintage sets with NO ASSEMBLY INSTRUCTIONS included.
Bonus: The Instructions are FREE from the manufacturer! No forms to fill out, no personal information necessary.
Best of luck....