what is the higest coolant temp that you register on united states 1995 s420, that is if your outside tempearture is 95 to 100 degrees?
Welcome to the forum sandcuser! Assuming a 50/50 water & antifreeze mix, I'd think the temperature gauge should ride around 70 -- 80. That's a guesstimate mind you. [:)] The question is what is your temperature gauge currently telling you? Here's a alternative that several owners have taken to lower their engine temperatures. Note what the author states MB has told him about higher engine temperatures...
http://pages.prodigy.net/jforgione/MB_CTS.html
Please keep us posted as to both your findings & decision. Inquiring minds want to know. [8)]
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