Well, I've checked mine out and have had a bit of a surprise.
When turning the key to power up the electronics, but before going to start the car, the dasboard lights come on for a self-check,
with the following exceptions:
- Main beam and turn indicators on the dash
- Sidelight and headlights square in the warning light panel.
- Boot open warning square, top right on the warning panel
I'd not expect those to come on, they are just repeaters showing the state of your outside lights
- Seatbelt light, top left square
The manual says this may or may not light up depending on the country the car was sold into. So, not worried there.
And I've saved the best till last.
- Engine Management light "excess of pollution", middle row, far right. The CEL, the one we're all worried about.
The manual says this
*should* light up as a self-test. I'm going to ask my local specialist independent VAG garage, who does all my servicing, what they can tell me about this. Is it supposed to light up, or is it, like the seat-belt warning, country-dependent.