Hi,
I'm sure someone will explain this in more detail however if your bus was built in SA then you're gonna be struggling for m-codes. I've got a S067R and have had similar problems, SA buses were made as kits in primer in Germany then put together and painted with optional extras fitted in SA, therefore they didn't have m-codes, if you put up some pics of your bus people may be able to help with the paint (if it's the original colour) unless it's a South African only colour,
Sorry for the bad news but hope it helps!
Matt
P.S - See How friendly we are? If only the folks down on aircooledvwsa.co.za were as gelpful to us Brits! :lol: