dboyceclk320

I have a 2000 clk320. Today is approx 80F and my temp seems to run at just about 90o F. This is my first spring and summer with this car. Does the clk320 run hot? I am use to my 740 BMW
running all year at dead center on the guage.I am just making
sure that this is normal.
Thanks in advance for your imput.

E55AMG99

Are you sure about that 90F reading? You must mean 90C which is normal.

dboyceclk320

Your correct 90 c. I believe that dead center is 80c and i seem to
run in between the 80and 100c mark.
thanks

E55AMG99

My 2000 CLK430 varies about the same amount depending on how and where I'm driving.

rval_1999

Yeah this is definetely an odd thing with the 208's, they seem to run "hot". My aux fan came on for the first time today, though it was not spinning very fast...... I touched the hood and almost burned my hand, though the coolant temp was 90 C.

BTW, in the BMW's (I used to have a 528i) the dead center line of the temp gauge actually represents an acceptible "range of temperatures" (note that the BMW did not indicate the temperature on their gauge), whereas MB gives a more precise temperature reading.... it's concerning to me too, but is normal.

Also, try holding in the REST button for about 10 seconds when the car is on.... you will see a new display on the climate control, the number "1" will be on the left side and another number will be on the right. Using the AUTO buttons (Drive side is up, Pass. side is down) scroll to number "6", this displays the coolant temperature in degrees farenheit.

Rick

HoosierCLK430

I asked my MB advisor that as I too have BMW that runs DEAD CENTER...he stated that MB does run a little warmer and that there is absolutely nothing to worry about. I especially notice that the during the mornings as the car is warming up...the temp actually stays in the 90c range more and then drops as it gets warmer either by driving or time/distance.

patrick39

I have been noticing the temperature of my 01 CLK 320 for quite a while and I found that recently (in past two months), the temp gauage is a little bit higher than dead-centre. I live in Toronto and the temp here is not even warm (11 C today, but tonite will drop to 1 C). I am also concerned about the coolant temp. and in my opinion, I think normal is at the dead-centre and there must be something wrong if the temp. is higher than normal. My car is almost 3 yrs. now and is due to coolant change in summer; how long since you guys changed the coolant? I am not sure if this temp. surge relates to the effectiveness of the coolant. Maybe the coolant loses its ability to "cool" the engine? I will bring in my car for oil change next month and I will bring this up to the service advisor and ask for his opinion.

nickv

Yup, I run above the middle as well, typically right at 90 C...but sounds like it is nothing to worry about.

tokomo

Mine runs around 89 on city but on highways it will go down a bit to 83. I guess it's because of the cool air rushing into the engine bay.

I asked my service manager and he says it's normal.

I won't worry about it unless it goes to 100c because coolants are not suppose to boil that high.

E55AMG99

??? Coolants are not supposed to boil period! Boiling causes air pockets which don't allow heat transfer and it causes a rapid expansion of the coolant which has no where to go but on the ground.

100% water boils at 100C (212F) but water mixed with the correct ratio of coolant boils as high as 115-120C (240-250F). As long as the coolant is not boiling, the engine can run as hot as it wants. Obviously, the hotter it runs, the less headroom it has to deal with heavy loads on extremely hot days.

Greg

EDIT. The water boiling temp is at sea level and the coolant temps are under 12-18lbs of pressure. Water boils at higher temps under pressure.

tokomo

Exactly what I ment,

Don't worry about the Car Temp unless it reaches 100C.