Coolant? 2016 C350e (S205)

[Wheeker]

The "Coolant level low- top up coolant" light has come on a couple of times so I popped into my local Auto Factors & bought a bottle of pink coolant, as there's pink already in there. However, now I start reading up on this, apparently it's not that simple? I can't really make much sense of the Mercedes Benz website advice. Not even sure which engine the C350e has (MXXX?). They mostly seem to require 325.6 coolant, the one I bought is 325.3. Also MB say 325.X means it needs to be diluted, but the bottle I bought says "ready to use" which I took to mean it doesn't need to be diluted. Can I use the 325.3 just as a top-up or am I best to go to an MB dealer & buy whatever they recommend?

 

[BlackC55]

If it needs a small top up just use water.

 

[Will]

As above - most cooling systems hold around 10L or something, 0.5L even is only 5% - just use water, better than mixing the wrong stuff into it