Just got a check coolant level message. How long do I have to add more coolant from the time of the message? Won't be able to do for a few weeks. Also, should I do a flush or add more coolant?

 

Also, does anyone know the part number for the coolant so that I can order. Thanks

 

You shouldn't have to flush your system if you just adding a bit of coolant.

Here is a supplier of OE Mercedes coolant. https://www.autohausaz.com/pn/MB-Q1030005

I think that's the correct spec for all new Mercedes, and I think it supersedes and is backward compatible for older specs. DO NOT quote me on that - check the vendor's specs further down and verify that you're comfortable.

 

first picture is my coolant level with the white line. Can i just top off if that low?

Also second is the antifreeze MBparts says is compatible. The one you provided appears to not be one of the part numbers cited as a superseding part order.

 

If you provided your VIN on that website, it's probably correct.

Since there seems to be a few options (Xerex is another aftermarket supplier, not OE) I'd ask my dealer, who will look it up by your VIN.

I probably go to the dealer to buy the correct stuff.

For that matter, since I don't have any way to dispose of 5 gallons of coolant (it's toxic), I'd just have the dealer do it.

Is there a special way to burp the system?

Edit: check your owner's manual for the correct reference point on the overflow reservoir. Check when cold, and use that reference point.