Originally Posted by vstech

While at operating temperature if the hose is not as hard you need to change the radiator cap or the thermostat... system pressure has little to do with the water pump... it's all about thermal expansion

Originally Posted by w123fanman

While on the subject, I may need a water pump for my 190D. My car has been running a little hotter lately and the pressure in the upper radiator hose doesn't seem to be as strong as it used to be when the engine is warmed up.

Pelican offers a variety of pumps
Saleri for $67.25
Graf for $80
Laso for $97.75
Meyle for $77.00
and Genuine Mercedes for $277 (or about $210 from my local dealer's discount site)

Also have seen a Geba pump for $74 on another site.

Besides the OEM pump (cause I don't want to spend that kind of money if I don't have to) and the Meyle pump (knowing it is likely no good), which of these would you recommend?