
Ok, I am really sorry about the repost. My fault, I was heading to bed (on the east coast) and my wife asked me to post the question. Lazily, I did so, rather than search. What I should have asked then, after doing a lot of research was:
I cannot find anywhere (including the threads linked above) where someone actually claims to have disabled this via the VAG-COM on an 04 Passat, other than recoding the country code, (which has its drawbacks for sure). Ross-Tech's site has instructions for MkIV and Toureg to do this, but the Passat instructions are devoid of this info. I can find plenty of evidence of this working on MkIVs and Touregs too.
Andy at Ross-Tech suggested trying this:
-----------------
[Select]
[17 - Instruments]
[Recode - 07]
Write down the existing coding for future reference.
Enter 5-digit code from below
[Do It!]
Look at the first two digits in the coding. Add the values for the options together to get the correct coding.
00 - No available equipment
+01 - Brakepad wear sensor warning active
+02 - Seatbelt warning active
+04 - Washer fluid level warning active
---------------
Which is the same as for the MkIV platforms. I don't have a VAG-COM on which to try this, (though I am thinking of getting one). So has anyone done this successfully, or even heard from someone who has done it successfully on a Passat? Maybe if we resolve this conclusively, it can be posted in the info forum or the newbie sticky thread.