You see stuff like this really annoys me and makes me instantly think there's more to it.. "The oil level light is permanently on, but this is obviously just a bad sender and nothing to worry about. The speedo doesn't work, but on my other V6 this only cost about £35 to have fixed at an Alfa specialist."
Why haven't you fixed/replaced the sender then? It's a 2 minute job.
£35 you say? Again, such small change why not do it?
Might be good, might be a complete box of frogs. You never know with an Alfa.