ESP Warning Light Fault..

Help..

I've got a problem with my 2005 B7 1.8T A4 (not quattro).

The warning light on the dash is not coming on when I start the car or by pressing the ESP button. The traction control seems to be working as it should but the light does not come on when it kicks in.

This may be unrelated but it started playing up after the car was left over the xmas break for a few days and I checked my tyre pressure's and found my two rear tyres to be low (now all at 32psi as per door pillar label.)

I've checked the two fuses for the ESP Both okay, when I removed the 10amp one and started the car it triggered the DIS panel warning for the brake system, So it seems as though its working.

I've checked the brake light bulbs/switch, ABS works fine, no other dash warnings, car drives fine, Battery Volts 12.2v

Do the dash warning LED's go bad.?
Any ideas..??

No didn't try pushing the switch. Didn't get uncontrolled wheelspin when testing the car it acts the same as before the light problem, not very scientific i know... Hope its not the LED, dont fancy getting a new dash panel.

I've not got Vagcom but starting to wonder if it would be a good investment..

Update - Disconnected the battery last weekend and noticed that the esp light came on when starting the car after reconnecting, then It went out and didn't come back on even when pressing the switch. Then this morning when starting it came on and worked as normal, done about 70 miles, so it must have been sorting itself out..??