A vintage Mercedes-Benz is seen at the Warsaw Oldtimer Show in Warsaw, Poland, on May 12, 2019. Over 1,500 iconic classic and vintage cars and motorcycles were presented during the Warsaw Oldtimer Show. (Xinhua/Jaap Arriens)

A Porsche 356 is on display at the Warsaw Oldtimer Show in Warsaw, Poland, on May 12, 2019. Over 1,500 iconic classic and vintage cars and motorcycles were presented during the Warsaw Oldtimer Show. (Xinhua/Jaap Arriens)

A vintage Mercedes-Benz is seen at the Warsaw Oldtimer Show in Warsaw, Poland, on May 12, 2019. Over 1,500 iconic classic and vintage cars and motorcycles were presented during the Warsaw Oldtimer Show. (Xinhua/Jaap Arriens)

Visitors view a vintage Mercedes-Benz at the Warsaw Oldtimer Show in Warsaw, Poland, on May 12, 2019. Over 1,500 iconic classic and vintage cars and motorcycles were presented during the Warsaw Oldtimer Show. (Xinhua/Jaap Arriens)

A Chevrolet Camaro is seen at the Warsaw Oldtimer Show in Warsaw, Poland, on May 12, 2019. Over 1,500 iconic classic and vintage cars and motorcycles were presented during the Warsaw Oldtimer Show. (Xinhua/Jaap Arriens)

A Buick Century is on display at the Warsaw Oldtimer Show in Warsaw, Poland, on May 12, 2019. Over 1,500 iconic classic and vintage cars and motorcycles were presented during the Warsaw Oldtimer Show. (Xinhua/Jaap Arriens)

A vintage Mercedes-Benz is seen at the Warsaw Oldtimer Show in Warsaw, Poland, on May 12, 2019. Over 1,500 iconic classic and vintage cars and motorcycles were presented during the Warsaw Oldtimer Show. (Xinhua/Jaap Arriens)

Visitors look at a restored vintage car at the Warsaw Oldtimer Show in Warsaw, Poland, on May 12, 2019. Over 1,500 iconic classic and vintage cars and motorcycles were presented during the Warsaw Oldtimer Show. (Xinhua/Jaap Arriens)