Hi,

the reason for your AutoCheck-Display not showing the yellow symbols (The "OK" an so on) could be very simple. The are two bulbs for the AC-Display: one with a red coating and one with a yellow one. The yellow one could be broken.

Unfortunately you have to dismantle the instrument cluster in order to check or replace the bulb. As a result you have to remove the upper part of the dashboard, too. Yes, this IS a crappy design...

Bye,
Jens