your in the right section,
in the trade we would tackle this with a spray extraction machine like a numatic wet n dry or a goarge, all the fabric and roof lining will have a pre spray of g101 then use the machine to apply bio brisk which has odour killing enzymes in it plus i use a dash of zoflora in the tank which is antibacterial, starting with the roof lining and working down to the carpets, removing the stains and the tar residue from the fabric, if need be it will be done twice to ensure its all removed, then all the plastcs get a wipe down with g101 diluted,
when the interior is fully dry check for smells and if alls good apply some dressing to the plastics,clean windows with a g101 wipe down then a window polish, finally spray a nice scent onto the seats and carpets to freshen it up a bit.