The temperature on my 300SE/M103 stabilizes around 80C, whereas the temperature on my E320/M104 stabilizes around 90C: is this by design, i.e. the case for everyone else here?

BTW sincere thanks to all who contributed to my previous "M103: ..." and "M104: ..." posts yesterday: very helpful. And keep your experiences coming!

This site is so enlightening, hats off (again) to its creators, maintainers and contributors.

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1991 W126 300SE (M103)
1995 W124 E320 Wagon (M104)