In the old days if maf was at fault more often than not the engine would run better so I'd cancel.tgst out.
Not sure where the can sensor is located.
Could it also be a lambda sensor?
I'd also advise Changing the spark plugs and ht leads.
ULEZ
I know there's probably a lot of members worried about ULEZ from the 29th August. Here's the information from Audi:
https://www.audi.co.uk/uk/web/en/assistance/imports-and-exports.html
More importantly here's the email address:
[email protected]
I've emailed but waiting on a response. Will keep you all posted on how I get on. I appreciate my A6 most likely won't meet the limit however, I've done it as an experiment to help fellow members.
Please note that any certificate of conformity if FREE from manufacturers.