HI. Im, new to this forum and I appreciate that it is here.

Does anyone know what the operating temperature range should be for a '94 SL600 with 109k miles?

Thanks!

. . tell us what you are seeing on the temp gauge?? The fact that you asked probably means it higher than you think it should be???

To answer your question, MB states that the car will meet ALL specs at 80C or above. So that's probably the low end.

The upper side temperature can be most anything based on many variables; state of your radiator; mixture ratio of your coolant/water; aux fans operation; VFC operation to name the main 'players'. All of these contribute to keeping the engine temperature in a reasonable range.

My S500 cpe operates between 85C to 98C (w/ A/C on) depending on the weather and driving method.

Check out my web page's MENUs for some tips:
#17 for coolant mixture ratio
#18 for aux fans modification

__________________
Regards . . . . JimF
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'94 S500 Cpe

Visit my Mercedes Web Page

My dads 96 SL600 typically operates at about 80* celsius without the air conditioning to about 100* celsius with the AC on. As JimF said, it also has alot to do with many different variables, so with an almost new cooling system and Sacramento heat (about 100* fareinheit) I get what I consider to be normal operating temperatures.

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-Justin

91 560 SEC AMG - other dogs dd
01 Honda S2000 - dogs dd
07 MB ML320 CDI - dd
16 Lexus IS250 - wifes dd

it's automatic.