I had the same problem at my last mot, o/s/r was
breaking up. I had it replaced by an independent
audi garage for £176.
in my opinion, audi dealer prices have now become
extortionate.
Hi to be honest you can't tell what a batteries condition is with a multimeter, best go to Halfords and get it tested under load I.E, everything switched on lights, blower, heated screens, if the battery is remotely the original its knackered, you say the ABS pump was recoded with what?, was it your unit repaired or a new unit.
Steve.