Volkswagen Golf Variant Alltrack 2.0 TDI 184 hp 4MOTION 7-DSG (2018) Exterior and Interior

2018 Volkswagen Golf Variant Alltrack 2.0 TDI 184 hp 4MOTION 7-DSG car seen from outside and inside. The vehicle has 2.0 l, 135 kW (184 hp) TDI (diesel) engine. Transmission is 7-gear automatic DSG. Color is Black Rubin. Seat covers fabric "Summits", Black. Wheels are Kalamata 7.5Jx18, surface with polished finish and decor "New Brushed Dark". Fuel consumption is 5.2 l/100 km. Carbon dioxide emissions of 137 g/km.
The car was shown at Frankfurt Motor Show 2017 (IAA 2017).

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What is the peral on the left? 0:45