Pierburg 2E manual and airbox repair

Hi  everyone I am a new member and wondering if anyone can point me in the right direction as to finding a Pierburg 2E manual, online searches are just turning up blanks, also has anyone ever repaired the airbox fastening bolt/nut  at the front(the airbox is attached but bolt is turning freely, the nut has probably chewed the plastic), in which case anyone have one they would like to part with (0271296607 D).
Thanks for any help

Hi
Haynes do a brilliant manual for pierburg and solex carbs, (got mine off ebay).
I completely rebuilt two 2e pierburgs with it (one on the car and one spare) and the one on the car still runs perfect as my daily.
Most of the 2e parts from the manual are on this site in one form or another if you search.(the always excellent member rubjonny has posted a fair bit about 2e's in his time).
What's the problem with the carb.

Cheers bud, I have already ordered one. The problems are a high tick over, losing power on motorway hills and lumpy acceleration, it is an automatic however.