M5CLK

Hmm.. I got the low coolant level warning last nite, I was close to home and it was very late so I thought I'd deal with it in the morning. And my GF took the car out early in the morning and she said everything was fine and no warning... So I checked the coolant and it was like 0.5 liter down, it was hardly even low at all..

When should the warning starts to come up? I thought it would be at least half the tank empty before it's triggered? Was it just a false alarm, or would it be possible be a false???

m5q8

me too
I saw warning coolant , and when I add water it is warning about also 1 day

Fifth Ring

Keep an eye on it. It could be a sign that coolant is leaking into the transmission, which is a not-uncommon problem with the C32. In fact, it does serious damage to the transmission, so if the warning recurs, I'd have it looked at ASAP.

sales@eurocharged.com

If it continues, you could have a leak in your Intercooler. Pull the intake plenums and look down in the intake runners / head. If you see any build up, then you will know your IC is leaking.

m444

Yeah, it is a very high probability, that you have a leak in the supercharger intercooler, which is cheaper to fix than replacing transmission and radiator.

Have this checked soon. The IC is around $1800 and the supercharger must be removed to replace the IC (additional labor). This is VERY common.

pshek

If the intercooler core is leaking, then shouldn't you be able tell by looking at the exhaust fumes? I saw a Kleeman CLK55 W208 that had a leaking intercooler core, and when I looked at the exhaust fumes, you could see steam that seemed to hang in the air. Another way to test would be to check for glycol contamination in the transmission fluid.

Fifth Ring

I also wonder if a gas analyzer could pick it up at the exhaust pipe, even if it was not visible. It's possible that the combustion process and the catalytic converter eliminate any visible steam.

m444

Initially, the only sign I had was a minor amount of lost coolant. The simple pressure leak check on the cooling system confirmed a leak. The surge tank removal confirmed the IC core was leaking.

A glycol check for the transmission, indicated, the transmission was fine, no contamination.

Slater126

FWIW, my old '04 C230 was famous for this. The warning would come on about twice per year (usually in the winter). The coolant level didn't seem low upon a visual inspection, but I'd add a little splash and the warning would go away. The car never had any problems and always checked out fine when serviced. Thus far, my C32 hasn't given me the warning, but I've only owned it about 5 months. Maybe the W203 coolant level detector is a bit sensitive?

m444

On a C32, when the coolant gets low, there is a reason and it usually means a repair is needed. I added about 4oz of water about 4 times in about 4 weeks, when it was leaking

M5CLK

Thanks guys, but my radiator has been replaced so it's not that. And leaving only the IC core. I had the manifold checked like a month ago and it was fine, and pressure test/visual inspection also checked out. But I still suspect some leak since it IS down by 0.5 liters now..

Maybe it's in early stage of leaking, that's why the manifolds still looks fine, but yeah, I'll keep an eye out. Thanks guys.

wawy

I am currently waiting for a new intercooler to come in for this very reason.
After they pulled the intake runners they looked just like the pictures someone posted on the site.........

M5CLK

Just wondering, *if* my IC core is leaking, besides replacing the core, what else needs to be done? Obviously cleaning up the manifolds, but to what extend the shop needs to take things apart? And what steps need to be done to ensure the residues are cleaned off? Thanks!

hkycoldrct

WAWY,

Do you recall the link you were refereing too? I'd like to take a look at those pictures.

Ryanr317

I don't know about the C32's but sometimes on the other C's, a low level of washer fluid can trigger the low colant level warning. Top up the washer fluid and see if it makes a difference.

wawy

No problem....here you go:

https://mbworld.org/forums/showthrea...=144850&page=2

wawy

"My C32 -- All the firepower of a King Tiger II and the maintenance to go along with it!"

LOL....so true!