| I own a 1993 300SE, w/ a M104 engine. I've found to be normal the operating temperatures at about a 90 degree F outside temperature for it to: range from 90-100 degrees C. It was breaking the 100 mark recently so I changed the thermostat and it leveled out to just under 100 mark. However, when driving it will be about 90 and when stopped, say at a light, inches up to about 100, especially when it is hot outside. FYI. |