Assorted Manuals to help you fix your bug!
Note: A good Haynes manual is a necessity in an beetle lovers garage!
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Warning: BN2 GAS Heater is very dangerous
and very unpredictable! If you insist on fixing it yourself, do it in a
well ventilated area and use extreme caution. I would HIGHLY recommend
that you get a specialist to fix it for you (the dealer)!
The BN2 and BN4 manuals are available from http://www.espar.com/htm/specials/bn2bn4.htm . They will gladly send you a copy of the manual if you email them with your home address. (Note: there are also diagrams located in the device diagrams page!)
I also have this Perfection heater manual, It may be of some use. (Click to enlarge images)