If you are in the market for a midsize diesel luxury SUV, you have plenty of options. However, if you want a petrol SUV, your options are very limited. In fact, before 2016, you couldn't find even a single offering in the Indian market. Mercedes-Benz introduced the petrol variant of its highest selling SUV, the GLE400, in August and recently BMW launched the petrol variant of the X5. Let's see how these SUVs measure up against each other.