cant get info on my boiler ?

i have an old vaillant boiler need to get a manual for, i know how to do this but my problem is that i cant find any info on the boiler itself eg model number. the only info on it is a fabrication number 94 29926571, combicompact 80 92 26 gb02 and behind the cover is type vp5 - ze 15 bged01 any advise on how to find which is my boiler even by picture i could tll. any help please