Greased Piglet

Thanks, I have done but they don't know what the issue is. They think it's coming from the matrix. All diagnostics show no problems so I'm unsure what it could be and tempted to back out if the purchase. Some forums say it's normal and to do with cooling the turbos or something? 20250625_084523.mp4

Just bought an A3 2.0 tdi 2017. Every time I stop I hear a gurgling sound coming from the dash or matrix. Done all tests for head gasket, no leaks or coolant loss!?????????