Hi,
The Polo isn't offered in the US, but I will try my best to help.
What you described sounds like a failing crankshaft position sensor. When they begin to fail, heat adversely affects them. Since this happens in traffic, that leads me to think the under-hood temperature is higher causing the issue.
Take a look through this link and let me know if anything seems to mirror what you experience:
https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor
Let me know your thoughts.
Take care,
Joe
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Saturday, April 29th, 2023 AT 12:12 AM