I had same problem and it was a faulty battery fuse box (sits right on top of battery, can't miss it). Was told by another VW specialist that fuse boxes are faulty and contact areas start melting as they cannot handle load cooling fans draw when running a/c.
Bought it at dealership, replaced it in 10 minutes. (P.S. Dont forget to install 'jumper' type fuses in box. They did not tell me and I had trouble getting car to start, 'till I figured out I had left 'jumper' type fuses on old fuse box). Hope this fixes your problem.
Tuesday, July 16th, 2019 AT 9:19 AM
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