Mercedes-Maybach has pulled the wraps off the updated GLS 680 which replaces the outgoing GLS 600 and introduces a revised V8 engine with a flat-plane crankshaft. For buyers in India, the update is significant because the GLS sits at the top end of Mercedes-Benz’s SUV range and is among the most expensive models sold by the brand here. Apart from the powertrain changes, the luxury SUV gets subtle styling revisions and additional features inside the cabin. The new engine setup is the headline change, bringing more power to the flagship Maybach SUV.