When there is not enough coolant inside the cooling system, the coolant (if any) will lose its ability to cool the engine. When an extensive amount of coolant is missing, the engine will overheat within a few minutes.

Corrosion Prevention : Coolant will stop rust and damage, keeping your engine and cooling system in good shape for longer. As we know, not all engine coolant is identical. Different cars require different formulas with different colors to meet the manufacturer’s specifications. However, once you determine which formula you need, you can choose whichever brand you’d like. Genuine Mercedes coolant is one of the best ways to go as it is the exact stuff dealerships and the factory uses in brand new examples. We offer the latest specification stuff in its concentrated form in a gallon jug. Rowe provides a concentrated gallon of the older 325.0-spec coolant for use in the older engines if you’re looking for a non-Mercedes brand. Otherwise, you can use the official stuff found here. Performing a coolant flush on your Mercedes-Benz requires expertise and tools beyond regular vehicle maintenance tasks. Attempting such a task at home without professional experience can result in significant risks for yourself, your vehicle, and the environment. We strongly advise against this procedure at home to avoid such risks. Ethylene Glycol has exceptional heat transfer properties. It efficiently absorbs the heat generated by the engine and effectively moves it away to maintain the correct operating temperature. However, Ethylene Glycol is toxic and must be handled and disposed of carefully to prevent harm to humans, animals, and the environment. The best mixture is 50/50 concentrated coolant with distilled water. A lot of people run 60/40 thinking that it gives them better boiling/freezing protection. In terms of heating that's absolutely false, ethylene glycol has a lower specific heat capacity than water (quite a lot lower actually). So water can absorb more heat for a given unit of mass than ethylene glycol. The boiling protection comes from the radiator cap, which raises the pressure inside the cooling system by about 5psi when things get hot to prevent the coolant from boiling. To have good boiling protection, you need to make sure your cooling system can maintain pressure. As for freezing, a 50/50 concentration protects down to -38c, which is more than adequate for all places where people drive Mercedes (unless there are some Mercedes dog sleds for those living in the arctic circles). If you live in an area of extreme heat, you should consider doing a 40/60 mixture. The extra water content will help keep temps low, and there is still adequate corrosion protection.The recommended interval for replacing Mercedes-Benz coolant can vary depending on the specific model and type of coolant used. As a general guideline, Mercedes-Benz suggests replacing the coolant every three to five years or approximately every 30,000 to 50,000 miles. However, these are general recommendations, and the actual replacement intervals may vary based on factors such as driving conditions, climate, and the coolant type used. Mercedes recommends a coolant flush and refill every 30,000 miles or every two years, whichever happens first. Truthfully, you'll be fine to run the same coolant for a bit longer than that, but the antifreeze's cooling and protective properties won't be as strong as they were. That is especially the case with the older 325.0-spec Q1030002 and Q1030004 bottles of antifreeze. The newest 325.6 formula, part number Q1030005, has improved durability, so it should retain its properties for longer. is the usual spec for passenger cars and the approved coolants are typically the aforementioned G48 and G05. A w203 would've been filled with one of these when new i believe, exact flavour and colour would depend on who MB were buying coolant from at the time...

Car maintenance is really important to avoid repairs and save you money, so don't forget that if you're You can ensure the longevity and efficiency of your vehicle’s cooling system by regularly replacing your Mercedes-Benz coolant. When you visit us at South Coast Garage, our specialised technicians will expertly flush, drain, and refill your coolant system with the correct coolant. You can trust us to keep your Mercedes-Benz running like new. Top Tips for Maintaining Your Mercedes-Benz Cooling SystemIn the case of a pre-mixed coolant, filling up comes down to pouring it into the coolant bottle. Concentrated coolant (antifreeze) must be mixed with distilled water before usage, usually in a 50/50 ratio. Why does my Mercedes-Benz lose engine coolant? This is the traditional coolant based on inorganic additives and is called inorganic additive technology (IAT). It is a tried and proven chemistry that provides a fast acting protective film. The additives deplete and the coolant needs to be drained and replenished every couple of years. This type can be used on all mixed metal engines with components including steel, cast iron, copper, brass, aluminium and solder without any detrimental effect.

I'll give my input here. The color of the coolant doesn't really matter, what matters is the specification. You're looking for a MB 325.0 approved coolant. The reason why color shouldn't matter is because once upon a time, coolants were colored because of the chemicals contain inside. But these once upon a time coolants are far too old to be used in a modern engine (and using them will likely lead to damage). Modern coolants have their colors chosen arbitrarily, because all the ingredients in extended life coolants (the modern breed) are colorless. To help clear some of the confusion up on the more technical details of antifreeze and coolants we enlisted the help of Martyn Mann – Technical Director, Millers Oils UK - who has provided the information below. Sometimes, albeit unlikely, you'll be firm to smell an odd burning odor coming from under the hood.Most commercial antifreeze formulations include a glycol (to suppress the freezing point and raise the boiling point), corrosion inhibiting compounds and a coloured dye (commonly orange, green, red, or blue fluorescent) to aid in identification. A 1:1 dilution with water is usually used, resulting in a freezing point in the range of minus 37 °C to minus 42 °C, depending on the formulation.