- Joined
- May 17, 2010
- Messages
- 3,557
- Car
- S65, CLK5.6TT (WIP) & RRS 5.0 SC
Was your front hose that was weeping at the front under the radiator as mine has started to weep getting changed asap?
That's the one. They tend to leak around the connections, where rubber hose meets the metal sleeving. The hose is the bottom one in the picture below (picture borrowed from MBWorld website):

It is available from the main dealer for about £150. Alternatively, the rubber section can be cut and compression fitting can be fitted to both ends (shown in the picture). It will cost much cheaper this way (about £30-40).
You can be fine for a while but the leak will only get worse with time. I've heard from a local mechanic that he had a car in once. The hose burst, the fluid ran out and killed the ABC pump as a result (it cannot run on air, sadly). Happened quickly and was on a motorway so not much could have been done. Wouldn't have happened if the hose was replaced on time.
So yeah, I would suggest you change it, fluid and the filter while at it
