Make sure you service system at Mercedes-Benz with installed 1.8 engine correctly. To maintain cooling system you need 0-0 liters of Green coolant. Otherwise CLC-class made in 2010 won’t serve you long enough. There are some conditions in servicing cooling module at Mercedes-Benz CLC-class. It’s better to choose fluid in combination of 2009 year, 2.1 volume of motor and engine code of OM646.963.
A lot of M271.946 motors are used long in Mercedes-Benz cars but only with good service. 2.5 CLC-class motors of 2008 year will serve more by optimal service. There is a big plus in servicing 2010 Mercedes-Benz CLC-class with all regulations. To endure car life take only Green antifreeze and pour not more or less than 0-0 liters.