BERLIN (Reuters) - Volkswagen withdrew on Wednesday an advert posted on its official Instagram page for its Golf cars that it admitted was racist and insulting, saying it would investigate how it came about and draw consequences.The German car company, which has seen its reputation tarnished in the last five years after it admitted cheating diesel emissions tests, said it did not tolerate any form of racism.The advert on Instagram features large pale-skinned hands seeming to push and then flick..