This guide applies to later style turbo diesel engines that have a translucent plastic overflow tank for observing coolant level.
Checking coolant level is simple of the turbo diesel cars because of the translucent overflow tank.
Find the tank, it will be on the passenger's side under the hood forward of the battery.
Now get down low and have a look at the front of the tank.
Note the arrow that points to a line at about the mid-point of the tank. This is the level the coolant should be at.
If your coolant is low, top it off with a mix of about 50/50 distilled water to coolant. Only use a proper coolant for these cars, either the Genuine Mercedes coolant or one that is specified and formulated for the application.
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