pinoyk20

hi guys! just would like to ask about the normal operating temp of the engine of the w210 e55 amg 99 model. should it be on the middle of 80-90 or should it be on 80? or is it ok if it passes 90 on the gauge??? thanks so much

MR888

Hey, its ok if it flactuates a little between those numbers, depends how you drive etc.. hot days/traffic jams the temp usually goes up a bit, but goes down as you start driving.

pinoyk20

oh thanks so much!!!

saintz

What little I was able to find out regarding the W208 CLK radiator (should be the same specs as the W210), the thermostat opens at 80 C and the fan comes on at 90 C. So, the temp really should never be below 80 C when the car is fully warmed up. It will basically always be at or over 80, nothing to worry about. If you're going slowly, in traffic, or idling (no airflow over the radiator), the temp will go up to 90 before the fans come on to cool it back down. This is also normal. It's only if the temp gets well above 90 that you have an issue, as that means the fans are trying to cool the radiator but failing.

armaniE55

+1 I would also recommend flushing out the radiator and adding MB antifreeze (the clear one) can't remember the name of it or you can also go with this

http://www.valvoline.com/pages/produ...asp?product=10

pinoyk20

thanks guys! ill be bringing my e55 to the dealer for check up and maintanance just to be sure! thanks!