Thanks for the help. I will be going to a mechanic tomorrow to replace my leaking valve cover gaskets and will ask him what he knows about the PS Pulley. So that pulley is causing the AC Fan to spin?
Very true, but you are forgetting about the belt driven clutch fan. If that belt is slipping, the clutch fan will not cool the system. Then the electric fans kick in to compensate.Im not sure, I think the two are unrelated. The pulley is run by a belt and the fan by electricity
I know this maybe out there. Somebody may have hard wired the fans ! the owner did not it. and we as a group have to look at what we have at hand. The owner may not be telling the whole history. Not on purpose , just may not know the relevance . IE , car accident , used 2nd owner?
I build a 170 - 180 degree Thermostat assys for aftermarket performance , It fits M-113 K & for other AMG models. This is a True new assy . Not just a bunch of holes drilled in the valve. What does this have to do with Bossjj98's 05 ML-350 . Not much . But most of the customers I sell modded T-stat assys to , usually try the -10* fan mod setting in the ECU , before they purchase a modded assys from me. This is something & found within the ecu and can be reset by the Star diag corrections. But their comments are Man ! The fans run a lot and are very noisy. So Bossjj98's may have a ECU issue? Attached are the screen shots\ BTW after the modded T-Stat is install the fan correction remains as it was reset too , but the fans now operate much closer to normal & the engine runs cooler.
It's your money, but going to the dealer is foolish in my opinion. You came to this forum for help and have done nothing on your own other than swapping a relay.I am heading to the dealer for a diagnostic at the price of $141 per hour... Does anyone know if they would say anything if they see my Airbag Emulator installed to my ML?