As we traversed Montana highways and crossed the Continental Divide in an ML350 Bluetec, acceleration proved most urgent in the midrange stretch of the power band, where torque peaks between 1600 and 2400 rpm; passing slower traffic requires careful management of shift patterns while avoiding the engine's wheezy upper rev ranges, where oomph tapers off. (automobilemag.com)
The 1.6 idles quietly for a direct - injection four, though you'll hear it at full - steam upper revs where there's little to be gained reaching for redline. (autofocus.ca)
An optional V6 or turbocharged four - cylinder is rumored for the future but most drivers will find the current engine plenty powerful for daily driving, at least when it's kept in the middle and upper rev ranges. (kbb.com)