I whant to thank you guys for all the efort in answering my plea but in case anybody nows somebody which can helpme i will apreciate.
In the mean time you should ceck this site for transforming your diesel to run on waste vegetabil oil and diesel,do not be afraid , a lot of people already did this whith excelent results better than diesel. Those guys have a verry good forum same like this one and verry often mercedes name apear there.
All the mercedes pre 1985 are in fact the best for conversion
the name of the site is :veggievan.com:
Again thanks for your time
BOGDAN