Which coolant would I use on my petrol 1998 rusty E240 (w210) ethylene glycol or glycerine. I once thought there was only one type, go figure. Also if anyone can help with type of Diff oil. I've read through some of the forums but none mention this class and there seems to be a choice of 75w -80w and 85w - 90. Talking to a motor factors he reckons there is a choice of 80 or 90, not sure which way to go.
Thanks
Thanks
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