Was planning on changing the coolant on my 210. That's the only thing ive neglected. My car has never overheated but it seems too run really hot. What kind of coolant does it take? Any tips on servicing the coolant? Thanks

 

Unless you want to go to the dealer you can use Zerex G05 or the newer G48. Both are approved coolants for our cars. The G05 is the yellowish color we are all accustomed to seeing. The G48 is a blue color which is now standard fill if you get it from the dealer. BTW, the stuff from the dealer is formulated and bottled by Valvolene as is Zerex.

http://bevo.mercedes-benz.com/bevolisten/325.0_en.html

 

How hot does your car run?

 

how much coolant do I need? do I only use coolant? I heard somewhere its half 50/50 coolant and half distilled water. Ive been topping off with regular 50/50 coolant hope I didn't mess anything up. As for for how hot my car gets when I pull out the engine oil dipstick after driving for a bit its super hot cant even touch it when idling you can feel a lot of heat coming under the car and from the engine bay. The heat may be caused by other problems im having with my car right now (misfire rough idle) but that's another story

 

I meant what temperature does your instrument cluster temp gauge say it is when fully warmed up?

 

Really hot...seemingly.

 

Seriously? The oil dipstick, which has been sitting in hot oil, is too hot to touch...and there is a lot of heat being given off by the engine? Less than scientific don't you think?

They are all like that.

 

MB recommends a coolant change every 3 years. It will require about two gallons of 50:50 coolant if you drain via the petcock on the bottom of the radiator with the expansion tank cap off. You can get a little more out via the drain plug on the engine block which might be a good idea in some cases. Coolant is a 50:50 mixture of pure anti-freeze (ethylene glycol and additives) and water. Zerox sells both anti-freeze and pre-diluted coolant so read the label. It's not necessary to use distilled water but most people do. If you have really hard water (your own well?) DI water is probably a good idea. You want to stay as close as possible to 50:50 for best heat transfer and corrosion protection. If you are having to add, you need to find the leak or vapor loss and repair.

 

EASY,

Heater on to full power, turn on the engine for 5 min, thet let it cool down. Open the purge valve at the bottom of the front radiator (drivers side), flush. I dont remember how much coolant the car has, but the cars manual will tell you.
Buy blue pentosin coolant, allong with destiled water (50/50).

Remember to open the tank cap when flushing.

 

Update, I did all that I used zerox 05 and the rest distilled water. The car runs substantially cooler, doesn't get hot that fast. Before the temp gauge would always be so close to the 100 mark. Now its stays a little lower. And yes! my car seems to have regained lost power. Car runs way stronger I guess these cars have to run at a certain temp right?

 

100 is hotter than most people report but as long as the needle doesn't reach the red zone you won't do any harm. All cars have an optimal operating temperature and it seems like 80-90 is best for our W210s.

 

if I use more of the zerex coolant and less distilled water would it run even better cooler I wonder

 

No... The higher the coolant concentration, the less heat extraction you get. 50/50 is optimal.

 

right