I have recently read that some garages are failing early 1.8T cars Golfs and A3s on the MOT test because " they don't have a working engine management light when the ignition is switched on"
This is a new requirement on the MOT test.
Early 1.8Ts -AGUs had such a basic ECU they were never enabled to operate an EML FACT. (The light is present on the clocks and there is a bulb behind, it just won't ever illuminate.)
If you have had your car fail because of this appeal it.
AGUs still store fault codes.
Hope that clears it up for anyone with this issue.