5分50秒处，测试中的i4 M50与一辆X7并排出现，X7正在为停驶的i4 M50提供电力支持。宝马工程师表示，之前更换了空调压缩机以解决某个未公开的问题 ...

Given its status near the top of the BMW tree it is no surprise to find the X7 benefits from all the latest ... with the B58-powered M50 leading the pack (for now) ...