Hello
I've noticed my 2.0tdi temp gauge goes down when the engine isn't up to temp and I'm sat in traffic. For example it's slowly going up to 70 degrees, I wait at traffic lights and I can see it dropping.
It's fine once it's up to 90 degrees though. I believe even with the heater off it still does it.
I see the tdi has 2 thermostats, one listed as coolant and engine...
Thanks
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Temp goes down in traffic
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- Passat model: B6