The top automotive stories of the week- There's a lot that made news this week beginning with a study which said that diesel SUVs pollute more than small petrol cars. Then the Maruti Suzuki Ciaz S was launched with some new updates. The Tata Tiago too received a new, more affordable variant of the AMT. BMW finally showcased the new Concept Z4 and patent images of the TVS Apache RR310S have been revealed. And finally, Volkswagen India gives the NGT a roadmap to its vehicle recall strategy here.