i have a 1990 300e........it started leaking coolant the other day so i
decided to see if i could find out where it is coming from..
Checked all the hoses first, no leaks.
It seems to be coming from the front of the motor on the side of the
i can see most of the head gasket and it doesnt seem to be leaking(although
im not 100 percent sure).
so im thinking it is coming from the bottom side of the waterpump, but from
under the car i cant pinpoint it for sure.........
the car only has 170,000 kms on it.
I was wondering if the head gasket generally has a life expectancy this long
and also is it common to leak from the waterpump.
any thoughts on this would be appreciated
This is almost certainly the water pump. This is a job you can do yourself
over a weekend if you are mechanically minded. A couple of 3/8 universal
joints and extension bars make getting to the rear bolts much easier. A decent
pump from the Benz Bin is less than $200.
I just replaced the water pump on M104 (C280) over the weekend. Yes, it
takes time (about 5-6 hours actual working time, while ALLDATADIY says
4.6 hours of labor), but I encounter nothing that is too much trouble.
Prerequisite though, you have to own a good set of METRIC tool :-) I
had to use 12" or longer extension bar to reach the rear pump bolts.
On M104, the power steering pump needs to be moved aside. Not sure
about yours. Also, one of the bolts (front, top) uses hex key, without
enough clearance for a ratchet.
Don't forget to put a big pan (e.g. turkey pan) under the engine. Even
after draining the coolant, there is still plenty behind the pump.
My independent shop gave estimation for $700+ for this job.
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