I have replaced the radiator cap, and another is on order (and expansion tank) due monday. I'm returning the old ones under "warranty." Behr is the brand of expansion tank. THe brand of the THermostat is FEMI i believe?

ANd now the new (used) aux water pump is making some of the weird noises that the previous one did when it went out about 4-5 months ago!!!!

*** ALso, I think that I notice that it only begins to leak a LOT is right after I turn the car off..... ??

__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)

FWIW, I normally use Wahler thermostats. As I recall Bosch makes auxiliary water pumps. Best to use a reputable brand name. Avoid all URO parts.

__________________
Fred Hoelzle

The bottom of the radiator is leaking on the driver's side somewhere, as well as another hose that goes from up there down into the engine bay (covered with a metal sheath of sorts.
I am so angry because MB Elite in Newport Beach changed the thermostat and said everything would be fine after that but I needed a new coolant expansion tank.
They have never given me the time of day, but are a reputable MB auto repair that we are family friends with... I can't believe that I can't even speak to technician. GOing to a different place here in Newport Beach tomorrow am.

And the new Aux pump is making those f****** grinding/winding sounds again!?
What gives..

__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)

I'll have to double check on the brand of thermostat's they used in my car.
But the aux water pump is OEM Bosch!

__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)

David, recommend returning to MB Elite in Newport Beach if they worked on the cooling system. If the new thermostat is malfunctioning then they should replace it free-of-charge. At least that would be my expectation.

__________________
Fred Hoelzle

just got back from other service station... needs new radiator!!

And I read all the fault codes with my new reader.... but another post, another time!

Thanks EVERYONE!

__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)

David, recommend buying a Behr radiator. It's a fairly simple DIY job. Be sure to use MB-approved coolant.

__________________
Fred Hoelzle