"Check coolant level" Msg
Last edited by C300Sport; Jan 8, 2009 at 07:43 AM.
D
So after reading this thread, I'll just stop worrying about it.
Find the coolant reservoir.Mine is an oval black plastic bottle located on the drivers side .( RHD)
Screw off the top & check level . Should be about 1/2 an inch above the bottom of sensor. ( reservoir about half full).
Top up with MB coolant . Mine required diluting with 50% demineralised water.
The above details are for the 220CDI Diesel. The US petrol vehicles may be different.
A US resident on the forum should confirm these instructions.
The Best of Mercedes & AMG
Find the coolant reservoir.Mine is an oval black plastic bottle located on the drivers side .( RHD)
Screw off the top & check level . Should be about 1/2 an inch above the bottom of sensor. ( reservoir about half full).
Top up with MB coolant . Mine required diluting with 50% demineralised water.
The above details are for the 220CDI Diesel. The US petrol vehicles may be different.
A US resident on the forum should confirm these instructions.
The level dropping 2 inches in the expansion tank is not even close to 1/4 or 1/3 of the total coolant level.
You, in another hand, I would look for the cause of the message you're getting...
You added WHAT?2005+ c classes (w203/204) have a very special coolant system with a 15 year life. This is achieved with a special gel pack inside the coolant reservoir that adds chemicals to the coolant over time.
You can only use MB coolant (or Zerex G-05 which is the same thing, just not MB branded.) Prestone is a totally different formula and is likely to cause problems in the long run being mixed with Zerex.
I put over 200 miles on it today after that without problems. But, I will have to have the coolant checked before winter to ensure I can drive it in 0F weather.
I put over 200 miles on it today after that without problems. But, I will have to have the coolant checked before winter to ensure I can drive it in 0F weather.
The good thing is that it was probably only a few fluid oz.& should not have any detrimental effects.
As this model seems to be sensitive about the coolant level I would recommend a small keeping a small container of ready to add MB coolant in the boot or check your level before leaving town.
I strongly recommend buying your coolant from the MB dealer. You will use so little so the cost is not a factor & you will be sure that it is not adding any chemicals that are not compatable. Make sure that you dilute it, if required ,to the correct consistency with demineralised water.
Having the incorrect Ph & corrosion inhibitors in your coolant water can cause expensive problems with your radiator , head & block.
My 220 CDI does not require a coolant change for 15 years or 250,000 km so the correct top up is most important.
I had the same message appear on my C350CDi this week. My car is only a month old. Dropped into the dealer and my coolant wasn't down. They said keep an eye on it as it could be a faulty sensor. Has only happened once and not in the last few days!..
You added WHAT?2005+ c classes (w203/204) have a very special coolant system with a 15 year life. This is achieved with a special gel pack inside the coolant reservoir that adds chemicals to the coolant over time.
You can only use MB coolant (or Zerex G-05 which is the same thing, just not MB branded.) Prestone is a totally different formula and is likely to cause problems in the long run being mixed with Zerex.

http://www.valvoline.com/products/co.../antifreeze/42
http://www.valvoline.com/products/co.../antifreeze/42



Would take an MB over those things anyday.