See also:

Breaking-in notes
The first 1000 miles (1500 km) The more you look after the engine when it is new, the more satisfied you will be with its performance in the future. • Drive at varying vehicle speeds and engine ...

Fuel requirements
Gasoline engines Use only premium-grade unleaded gasoline. The octane number should be at least 91. Details can be found on the gas pump. The octane number is the average value of the Researc ...

Exterior & Styling
A number of the GLK350's competitors, like the XC60 and Infiniti EX35, have sleek exterior styling that favors smooth lines over right angles. The Mercedes, meanwhile, maintains the traditional up ...