Go into [17] instrument cluster module. Note your current coding - something like 0003403
The third and fourth numbers are made up like thus:
00??x0x
+00 - No options
+01 - Brake pad warning
+02 - Seatbelt warning
+04 - wahser fluid warning
+16 - saloon (Jetta)
Therefore in my coding above (0003403) - the thrid and fourth numbers in this are "03", which would be +01 (brakepad warning) + 02 (Seat belt warning) = 03. Thus to remove the seatbelt chimes, just subtract 02 from the third and fourth numbers.
Note, if you hover your cursor over your existing coding, a pop up will appear showing you all the options and the numbering.
Hope this helps.
GT-TDi - Almost fully loaded and loving it !