Just remember to use R10 hose in the fuel pump basket (R9 can't handle submersion) and seal the push fit connectors with viton rubber, too the basket collar is fine until you full it apart, I didn't touch my fuel pump in the basket, just the hose and the non return valve so I left the collar alone. I did replace the mat at the bottom of the tank though, it was just goo. Ferrari sell a matching part cheaper that Alfa.Many thanks, everyone. I have upgraded all engine bay fuel rubber to R9 and plan to do the same tank end too, including submersible. Car used almost everyday so no sitting issues but is a concern if the fuel pump basket can't cope with E10. Think am going to just have to bite the fuel cost bullet and pay extra for premium E5. Have just bought a set of 12 viton injector seals but all systems are only as good as the weakest link. Heaven forbid that turns out not to be the fuel pump basket but the plastic fuel tank itself.
But no harm in futureproofing that bits that you can! And it sounds like you already are doing thatThink the simplest conclusion is to avoid E10 in a 164. The cost of ensuring everthing is E10 safe is likely to be significantly more than just paying extra for E5 fuel.
Yes, all Busso V6 vehicles including the later 3.2 GTA models are listed as incompatible with E10, other than in Brazilian markets."I regarded the fuel line problems as caused by an inferior product used by Alfa. Maybe related to E10? Replaced by a newer US product."