ECU and battery Problems

[limoncello]

dont know why that didnt work , link should be

http://www.audi-resource.com/mmifalsewarn.php

yes your right, the car thinks its got a problem and shuts stuff off, though there is also a small drain which seems undetectable to diagnostic equipment (based on Audi not finding it for 5 days), this drain will kill your battery eventually as it did mine, others seem to have a lot more drain which causes the car to not even start. the enrgy manager is incorrectly calculating the battery.

ive had a hell of a time with this issue for 2 years, so happy now its fixed, not sure on the cost as audi did it for free in the end.

conversation went like this

After 2 days
Tech: there isnt a drain, so we are still diagnosing it
after 3 days
Tech we think we found the problem, your headrest monitors are wired in to the cigar lighter and causing a small drain
me: No thats not it, they have only been there for 7 months, the problem for 2 years
Tech : Ok will take another look
after 4 days
me: where are we
tech: im currently working on whether the battery is coded correctly
me: it is and even if it isnt the battery is new, had the problem for 2 years
tech: oh
me: lets think it through, the car says that the battery is low, is it
tech: yes
me: have you tested the battery
tech: no the car says its low
me: supposing its wrong
tech: the car calculates it
me: what if its not
tech: the battery manager does it automatically
me : what if its wrong, what if its calculations are wrong
tech: im looking for a battery drain
me: what if we dont check that but look at whether the energy manager is lying to us
tech: mmmmm
me : perhaps software version of the ecu
tech: mmm its worth looking at
5 hours later (and after i trawled tsbs etc)
tech: havent found anything
me what about this tsb, for this exact problem that says i need a software update
tech: il take a look
next day: all done, seems to be fine now..

its done by either a dealer hooking you up and running a SVM (Software version management) Update or putting the correct version of update cd in to a VAS505x

apparently the fix also fixes other issues, im not sure what these are