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Hello I'm Wolfgang. On your vehicle you have 2 batteries. A starter battery and a vehicle electrics battery (left). Both are located in the trunk area. The left battery is the culprit. Most likely cause of this. Replace that battery. It is a special battery. AGM BATTERY. Audi and Vw dealers carry that battery After a scan tool is needed to clear all fault codes and relearn the windows and trunk stops. These batteries last 3 yrs w/o a trickle charger on the electrics battery. These cars usually sits and the batter will loose life after a while.
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