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A lot of the 'specifications' written by manufacturers are primed to lure people into higher priced selective markets in cooperation with car manufacturers. It also 'scares' ppl into taking the car to the dealer to perform services easily done in a DIY environment. Oils, antifreeze, bulbs, air/oil filters, OEM parts vs aftermarket... The list goes on. Just what in a MB engine/radiator cooling system requires only OEM recommended antifreeze? People see an all aluminum engine and rubber hoses mostly. Heater core/lines, same thing. Valves 'O' rings, same? Please lets see what will 'degrade' if a universal grade Prestone is used (either 50/50 or concentrate)? No 'wiki' pages, just a simple question!


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