So after a dreaded 'top up coolant' warning on my CLS63, I checked the water level and it's pretty much where it's been for the last 6 months Oil level has gone down very slightly if anything, not risen, no excessive white steam from exhaust even in this cold weather, only thing I can think of that may have caused that is I was parked on a very steep incline when I started it up and got that message? No misfires or CEL, thoughts? Show
 Joined Apr 23, 2013 Messages 9,562 Location Harwich Car CLK 500 Top the water level upto where it should be, make a note of the mileage and drive it until you get the message next time is what id do. Maybe nothing to worry about, Most AMG engines use a little bit of oil "so ive been told"
So after a dreaded 'top up coolant' warning on my CLS63, I checked the water level and it's pretty much where it's been for the last 6 months Oil level has gone down very slightly if anything, not risen, no excessive white steam from exhaust even in this cold weather, only thing I can think of that may have caused that is I was parked on a very steep incline when I started it up and got that message? No misfires or CEL, thoughts? Parked on steep incline.............I think you have answered your own question. Tony
Joined Jun 26, 2015 Messages 203 Car CLS63 AMG (W219) Parked on steep incline.............I think you have answered your own question. Tony Parked there a few times before and it never happened, topped up and will see how it goes
How much did you have to top up to the correct level? Half a cup I would imagine. Tony
Joined Jun 26, 2015 Messages 203 Car CLS63 AMG (W219) How much did you have to top up to the correct level? Half a cup I would imagine. Tony About 700ml or so
Joined Jun 26, 2015 Messages 203 Car CLS63 AMG (W219) Lots of hard driving after topping up, level hasn't moved. I guess it doesn't totally rule out slow coolant loss via a stretched bolt etc?
Joined Jun 26, 2015 Messages 203 Car CLS63 AMG (W219) When I topped up, I added until the level was just barely covering the tops of these cells, then overnight the level dropped very slightly with the cold temps to here Then for the last few days, it's been ranging from here when cold, to about 1cm from the lid when hot, the level rises by around 2" after driving, I'm not sure if there's a secondary valve somewhere that helps prevent coolant gushing out if you open the cap when hot, but I unscrewed it earlier and saw coolant beginning to run under the tank along the metal plate, but checking all around the cap as this was happening, none was coming from there Anyhow, if all's well, it's certainly a wake up call to get the weistec studs in there.
Joined Jun 26, 2015 Messages 203 Car CLS63 AMG (W219) Top the water level upto where it should be, make a note of the mileage and drive it until you get the message next time is what id do. Maybe nothing to worry about, Most AMG engines use a little bit of oil "so ive been told" Yeah so I hear also, what I was wondering is, if the coolant was contaminating the oil, would the oil not be higher than before? Or could this also be variable depending on whether or not oil is entering combustion chambers along with coolant?
Joined Jun 26, 2015 Messages 203 Car CLS63 AMG (W219) Just now...
Joined Jun 26, 2015 Messages 203 Car CLS63 AMG (W219) Update: the level when cold sits around the same place as the initial pics, varying depending on how cold it is (particularly cold the last 2 days) it goes from there to anywhere between the top of the White plastic tab and the lid depending on how hot the engine is, after topping up to the white tab, it went below there after diving and letting it sit overnight, and noticing almost daily wet patches of coolant on top of the expansion tank as if it's been pushed out of there, but in all, I can't say for sure if any has been lost, other than bits here and there out of the cap? I daily the car, thinking it would be much more apparent than this if it were a stretched or snapped bolt? Also (I know it's far from the most conclusive test) I took out the oil dipstick while the engine was hot and reached it down and dropped some onto the cat to check for sizzling, no sizzle. Last edited: Dec 29, 2016
Joined Feb 1, 2016 Messages 169 Location Pakistan Car W211 E270 cdi - 2003 Just a thought, have your battery checked from a dealer.
Joined Jun 26, 2015 Messages 203 Car CLS63 AMG (W219) Update, all seems well with the coolant level despite many miles, over 1,000, every report I've seen of the head bolt issue varied from there being no symptoms to instantly CEL, steam and misfires to gradually losing coolant, but even the cases where 'slow' coolant loss was the first signs, they were losing a lot more than this maybe seemed to have, unless there are any of which I'm unaware?
Joined Jun 26, 2015 Messages 203 Car CLS63 AMG (W219) Ok update, to me there does seem a very slight loss now, when I topped up, I ensured it was cold and level on my driveway, I topped up to cover the 'tab' which sticks up inside the tank, which the manual states is minimum cold level, now after over a month, the level has dropped around 2cm to the seam of the tank, between the black half and white half, the tab sits higher than this by a few cm, other models such as the C63 don't have this tab and the level is stated as being between the black and white seam correct me if I'm wrong? Will continue to monitor this and prepare for the new studs to be installed. It's certainly the slowest loss of coolant I've seen reported if the bolts are either stretched or corroding, usually within a week people reported that the tank was very noticeably drained of coolant, that's the ones which didn't have the very sudden loss and engine light and rough running, steam etc.
Joined Jun 26, 2015 Messages 203 Car CLS63 AMG (W219) In the process of: updated head bolts, SLS valve buckets, iPE headers with catless down pipes and a custom map with MSL, acid worked around my budget and soon I will be making the trip to finally see this awesome place I've heard so much about. What is the coolant warning on a Mercedes E class?If this light is red you should stop straight away, as without enough coolant your engine could get so hot that it effectively welds itself together, causing irreparable damage. What does top up coolant see owners manual mean?The warning message So a warning message has popped up on your screen, that reads something like this: “Top-up coolant: see owner's manual for warning message”. Don't panic, it is as simple as it sounds. It is just time to top up your coolant. Why does my Mercedes say check coolant level but coolant is full?If there are no leaks and the coolant level is full, then the problem may be with the coolant level sensor, thermostat, or fan switch. How do you add coolant to a Mercedes E class?How to Replace Coolant in a Mercedes-Benz. Open the hood of your Mercedes-Benz, and locate the coolant reservoir. ... . Make sure the engine has cooled down before adding coolant.. Open the radiator cap.. Using a funnel, pour the coolant into the reservoir, and be sure that it's a 50/50 mix of coolant/water.. |
