[dadrab]

Good day all.

I found a coolant puddle on my driveway a few days ago. After searching for quite some time, I did find a trickle of coolant coming from a "weep hole" on the RH inner fender, beneath the coolant reservoir. I see no hoses leaking.

I know the overflow hose runs from the back of the reservoir into the fender on that side, but have not been able to find where it terminates. I figure that hose ends inside the fender and overflow is supposed to come out of that hole.

There has been no overheating going on, but the reservoir is low. The coolant level sensor in the tank is apparently not working since I've seen no dash light.
Could this be something as simple as a tank cap seal gone bad?

I normally don't live that good, but...

Thanks much.

 

[281lxm]

Well most likely the bottle is just full. That braided hose that runs from the reservoir into the fender could be toast, cracked and leaking and or just the bottle is full and spilling out. Turn wheel to the right and then remove the (IIRC 10mm screws) from the inner fender wall and have a look. Bottle has two nipples, one with a hose and the other to spill out when full.

 

[1mbzdoc]

replace the cap on the resivior(expansion tank)

 

[GreenT]

replace the cap on the resivior(expansion tank)

^+1

 

[GreenT]

I know the overflow hose runs from the back of the reservoir into the fender on that side, but have not been able to find where it terminates. I figure that hose ends inside the fender and overflow is supposed to come out of that hole.

It goes into an overflow tank inside the fender.


EXPANSION TANK,MOUNTING AND HOSES. Fits: 1988 Mercedes 420 SEL Sedan | Mercedes-Benz of South Atlanta