timdoyle91

I have a 2013 E220 that seems to have developed a slow coolant leak (requires around 0.5 litres every 1000 miles or so). I originally tried replacing the header tank cap as I thought it was leaking however the issue remains.

I think I have located a leak visually and have attached pictures of what I've spotted, although I'm not sure which part it is actually leaking from. Does anyone have a knowledge of the system that could point me in the right direction?

Many thanks.

Plutoe

If you believe what you have pictured---have you seen coolant leaking, smoking or puddling around the hose connection-----if so change the connection.

belarus27

It looks like a slow leak... replace the hose.
or maybe just the clamp around it

Mumtaz Khan

If it's leakong from there them it's the fuEl filter housing that's leaking
it has an inlet and outlet connection for the coolant system at the bottom of it.
it cost £27.98 (plus VAT) from mercedes and is a VERY COMMON problem as pointed out by their parts guy.
Mine failed a few weeks ago also