Hey I see your another northern fella. Nice to meet ya.
I have a good source for processed wvo biodeisel - to be honest it works out cheaper then using virgin. I'm confident that the w124 300d works with no conversion/mods. This vehicle i'm less sure. I'll have browse round that forum.......it is a good resource.
Im based in chorley mate, not that far from you really. Feel a bit of a fraud on the site at the moment, not having located my Mercedes yet. But am a regular bio user, get it from a guy just outside of Preston, and stick it in the Mitsi, just keen to get hold of a 300d now - get that running on bio and happy days.
Plan one day, maybe even this year to build my own plant - its a bit daunting though - i've read the vegatableoildiesel forum till me head spins.
Still baby steps, get the missus a new motor then concentrate on the bio plant.
If you love the cheap fuel now, just wate till you get your own plant up and running.
Mine costs me about 7 pence per liter, you cant get much cheaper than that,
unless you run filtered WVO then it really is penneys.