Ok people. I am a novice and I am compelled to drain the coolant from my 89 300e. I have Prestone in it and I am compelled to drain it out after reading some posts. I have gone to my mechanic a couple time and every time I go he has a car on the jack so he tells me to come back later. I only have the jack that came with my car. Can anyone tell me the step by step procedure for flushing the coolant. I want to use MB or try out Valvoline's new MaxLife antifreeze if it is compatible with Mercedes.

Thanks in Advance