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Old 06-15-2001, 06:20 AM
David C Klasse's Avatar
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THis is under the hood on the passenger side towards the rear of the engine compartment.

The numbers might be a little hard to see. 1 is up at the top, 2 is a little lower than that, and 3 a little lower than that. 4 is down to the lower right, and 5 is even lower and on the left.

I just want help in identifying these parts. I know 1, 2, and/or 3 are probably the ECU or something... but I'm not sure. And I know that 5 seems to have vacuum lines going to it, but what's the purpose? Thanks guys.


[Edited by David C Klasse on 06-15-2001 at 05:23 AM]
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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!)
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  #2  
Old 06-15-2001, 03:14 PM
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Location: Tucker, Ga USA
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#1 Idle speed/ cruise control
#2 HFM fuel system ECU
#3 ABS/ Traction ECU
#4 Heater valve (DUO)
#5 Vacuum manifold (distributor)
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  #3  
Old 06-15-2001, 03:28 PM
David C Klasse's Avatar
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Thanks MBDoc!
I have been wondering this for the longest time! I love having a digital camera now.

BTW, what is Duo valve?
What is the vacuum distributor? Purpose?
And number one is a computer (?) the controls the idle and the cruise control?

Thanks again.
__________________
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!)
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  #4  
Old 06-15-2001, 06:14 PM
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Duo valve is for two zone heat control. Vacuum distributor is just that, distributes controlled vacuum to components which require vacuum inputs. Cruise control amp is now in an easily accessible location. Thank GOD!!
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No matter what you fix, there will always be something else to fix..
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  #5  
Old 06-15-2001, 11:38 PM
David C Klasse's Avatar
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Ok, so for the duo valve, i'm assuming that the dual zone is the front vents and then the feet/defroster.

And 1 is the cruise control amplifier? That's what I was thinking when he told me that. How/why does it also control the idle?

THanks for the help; sorry for all the questions.
__________________
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!)
Reply With Quote
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