Quote:
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Originally Posted by HG95S500
I have 1995 S500 with 106,000 miles. ere are some more facts which I hope will help shed some light:
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Water pump is not leaking (Water pump is original)
Radiator cap is original
<-- time to replace
Coolant level is good
Heater works fine
Coolant mixture is good with proper MB coolant
<-- Check out Menu#17
MB Thermostat is new and working
There is no evidence of coolant in the oil
There is no evidence of oil in the coolant
Engine runs fine overall
Thank you in advance for your help.
Regards.
Hynek[/QUOTE]
Recommend that you replace the "cap" since it's definitely is time! And I check the af/w ratio as shown in MENU#17. Odds are that the actual af/w ratio is 60+% for af. . . and that's not good for keeping engine temperature down. The only way you will know is to "test" it as shown in Menu#17.
If you want to turn the Aux Fans at a lower temp, check out MENU#18. Sort of like a do-it-yourself "Cool Harness".
If your VFC is 'bad', (if it's original, then is probably is), you can purchase a new one . . . or modify it as shown in MENU#20. You can also re-fill it; there's threads here on MSF that detail the how-to-do-it.
Well, that ought to keep you busy!