check engine?

[George Nimmer]

--
[ Picked text/plain from multipart/alternative ]
I just picked up a 2003 Jetta TDI.  (I know, it isn't an Audi, but it's
a VAG product so maybe someone can offer a suggestion).

It wasn't new - it was used, with only 1800 miles on it.  I used my
VAG-COM computer scan tool to check for fault codes once I got it home.
It had one odd intermittant voltage for something in the A/C system.  I
cleared the code, checked it again a week later, and it was still all
clear.  ok.

Now I have had it for 2 weeks, and I have 2500 miles on it.  Just today,
the glow-plug icon came on (flashing), which the manual says is the
diesel equivalent of the "check engine" light.  Also, the brake lights
won't turn off!  That's right - even when the car is off, the headlight
switch is turned to off, the 3 brake lights are still lit!  It doesn't
matter if the handbrake is up or down - the lights remain on.  I'm
afraid my battery will be dead when I get up in the morning.

Now here's the even more strange part - I plugged the VAG-COM in again
to check for codes - and it can't get at anything.  It reports all the
various system controllers as non-responsive.  The car starts and drives
fine though.

I'm taking it back to the dealer tomorrow.  Just wondering if anyone has
ever heard of such behavior before???

TIA!!
George
'84 and '85 4kq's
'98 Passat 1.8t
'03 Jetta TDI

--