Date registered: Oct 2006
Vehicle: 2005 W211 E320
Location: Tucson, AZ
Mentioned: 2 Post(s)
Quoted: 33 Post(s)
My temp gauge stays dead center too (except when I'm towing uphill) because at low speed or any time I'm sitting in traffic the cooling fan is working overtime to make up for the small radiator. 99% of people never notice it until the fan unexpectedly dies. I drive this car pretty hard so I want maximum cooling capacity.
If you're going to invest in the cooling system I would do the water pump too at the same time. Pull the water pump pulley (4 screws) and check the weep hole for any green residue. Or wiggle the water pump pulley to check for play. Mine had a slow leak and a little play. It's dirt cheap so why not. I'm not going to wait for it to fail.
Ah, I see what you're saying. Makes sense. Well, the shop took care of everything for me. Never thought to ask them about it. Maybe I will ... not sure if there's a particular test they do or something to check it? Maybe they looked at it, at least I would hope they did.
Edit: Seemed fine for them, spinning freely, no leaks. So I guess that's why a replacement wasn't suggested.
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2005 W211 E320
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Last edited by mgill85258; 05-03-2019 at 10:31 AM.