Car parking around Vienna, Austria

Hi, we have left our car for 2-8 weeks at a time. I usually look on google for a 'posh' street - not too posh! Then leave car parked there. It needs to be affluent enough to have neighbourhood watch keeping an eye on the street - but not so posh they report your car and it gets towed!! Seems to have worked so far! Other times we have used a website like 'park on my drive' to see if there's someone local who will have it for a small fee. In Scotland last year - we just rocked up at a farmer's and asked if we could leave it parked on his farm - £50 for 3 months!! This year in Norfolk the eco campsite we stayed at to meet up with cycle buddy - actually offered to have our car there - no fee cos we had camped!! Hope any of these might help! Have a great trip! ps - if leaving on street - a smaller town near Vienna or suburb might be quieter!