Nobby says, "Surely, the engine/cooling components on an MB are not that different then everything else." Who knows? Radiators are aluminium and copper, which is different.

I presume you own a Mercedes Benz. The car originally cost more than your average everyday car. If you have a cooling related failure, it will cost some money to repair the car. So I offer up the following simple logic.

Why would you question the manufacturer's recommended coolant? It's cheap. The coolant is only changed every two years. You are trying to save what 5 bucks by going with something else.

There are numerous detailed papers on the internet that discuss the chemistry in detail.

Steve