Vent Question
Thread Starter
Senior Member
Joined: Oct 2004
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From: Honolulu, Hawaii
2001 E55, 2002 ML55, 2002 SL500, 2003 CLK55
Vent Question
Okay folks, took a chance and picked up the 2001 E55 I've been looking at for the past month.
First question, the center vents aren't blowing. Any suggestions on how to get them to work?
Thanks!
First question, the center vents aren't blowing. Any suggestions on how to get them to work?
Thanks!
Junior Member
Joined: Mar 2008
Posts: 18
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From: New Hampshire
2002 E55 AMG, 1985 380SL
Dude welcome to the club! E55 is such an amazing car! Try turning the temp way down low (and A/C on?) and see if it blows then. M-Bs in my experience don't blow heat out of the center vents (but will blow cold air through them). My '85 380SL doesn't do it and my '02 E55 doesn't do it. Weird.
Thread Starter
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From: Honolulu, Hawaii
2001 E55, 2002 ML55, 2002 SL500, 2003 CLK55
I'm not using it in heat mode. I'm only running A/C.
But I did notice that the defrost vents are blowing cold air.
Is it possible for the vents to be stuck?
But I did notice that the defrost vents are blowing cold air.
Is it possible for the vents to be stuck?
Thread Starter
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Joined: Oct 2004
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From: Honolulu, Hawaii
2001 E55, 2002 ML55, 2002 SL500, 2003 CLK55
Spent more time with the E55 this weekend.
For what it's worth, I have no control over the venting no matter what the control panel shows.
Hope this helps with diagnosis a little more.
Thanks!
For what it's worth, I have no control over the venting no matter what the control panel shows.
Hope this helps with diagnosis a little more.
Thanks!
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From: Socal
07E63, 12E350, 08997TT, 16SiennaSE
Thread Starter
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Joined: Oct 2004
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From: Honolulu, Hawaii
2001 E55, 2002 ML55, 2002 SL500, 2003 CLK55
Very helpful link.
I used it and found that I've got a coolant circulation problem and may be low on refrigerant.
Still no answer to my vent problem, though.
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210 55
Ok some months ago i have the same problem with my car! maybe you think i'm crazy but the answer for my car was a little crazy yes, hahaha but here we go: the problem in my car was the doors lock central pump (down the rear pass seat). Inside the pump one little black vacum control the heater system (start or stop a micro switch), in my case the little vacum are damage & the vaccum negative pressure in the system dies! you can check down the right front fender have the vaccum acumulator & them have 2 plastic hoses one green (goes to the AC system) & one gray (go to the engine intake) you can apply suction in the gray plastic hose & pay attention if the accumulator manteine the negative pressure or not! if the answer is not, you have a lost pressure in the system.. in my case the little vaccum in the central pump let scape the negative pressure & my center vents close because the open/close vaccums not have pressure to open the vents! if some crazy that the rear central locking control the a/c pressure vents too but... Mercedes-benz thinks are a good idea 
I hope help you this info..
PS: Your coolant circulation problem sure is your recirculation/heater water pump (little electric in the right fender near the exhaust manifold)... in my car dies too
hahaha you can put ur A/C in HI temp & if the electric pump dosn't star try to strike them with a big steel HAMMER.. hahahahaha just kidding, try some little strikes with a little hammer & they can start again.. Fabio Daniel
Last edited by Fabio D; Jan 12, 2009 at 07:59 PM.
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Thread Starter
Senior Member
Joined: Oct 2004
Posts: 308
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From: Honolulu, Hawaii
2001 E55, 2002 ML55, 2002 SL500, 2003 CLK55
Hello friend!! how are you. Ok some months ago i have the same problem with my car! maybe you think i'm crazy but the answer for my car was a little crazy yes, hahaha but here we go: the problem in my car was the doors lock central pump (down the rear pass seat). Inside the pump one little black vacum control the heater system (start or stop a micro switch), in my case the little vacum are damage & the vaccum negative pressure in the system dies! you can check down the right front fender have the vaccum acumulator & them have 2 plastic hoses one green (goes to the AC system) & one gray (go to the engine intake) you can apply suction in the gray plastic hose & pay attention if the accumulator manteine the negative pressure or not! if the answer is not, you have a lost pressure in the system.. in my case the little vaccum in the central pump let scape the negative pressure & my center vents close because the open/close vaccums not have pressure to open the vents! if some crazy that the rear central locking control the a/c pressure vents too but... Mercedes-benz thinks are a good idea
I hope help you this info..
PS: Your coolant circulation problem sure is your recirculation/heater water pump (little electric in the right fender near the exhaust manifold)... in my car dies too hahaha you can put ur A/C in HI temp & if the electric pump dosn't star try to strike them with a big steel HAMMER.. hahahahaha just kidding, try some little strikes with a little hammer & they can start again..
Fabio Daniel
Ok some months ago i have the same problem with my car! maybe you think i'm crazy but the answer for my car was a little crazy yes, hahaha but here we go: the problem in my car was the doors lock central pump (down the rear pass seat). Inside the pump one little black vacum control the heater system (start or stop a micro switch), in my case the little vacum are damage & the vaccum negative pressure in the system dies! you can check down the right front fender have the vaccum acumulator & them have 2 plastic hoses one green (goes to the AC system) & one gray (go to the engine intake) you can apply suction in the gray plastic hose & pay attention if the accumulator manteine the negative pressure or not! if the answer is not, you have a lost pressure in the system.. in my case the little vaccum in the central pump let scape the negative pressure & my center vents close because the open/close vaccums not have pressure to open the vents! if some crazy that the rear central locking control the a/c pressure vents too but... Mercedes-benz thinks are a good idea I hope help you this info..
PS: Your coolant circulation problem sure is your recirculation/heater water pump (little electric in the right fender near the exhaust manifold)... in my car dies too
hahaha you can put ur A/C in HI temp & if the electric pump dosn't star try to strike them with a big steel HAMMER.. hahahahaha just kidding, try some little strikes with a little hammer & they can start again.. Fabio Daniel
This is exactly what I was looking for.
Were your locks not working also?
I'll take a look.
thanks!
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210 55
hope you help friend!
Last edited by Fabio D; Jan 12, 2009 at 08:31 PM.
Thread Starter
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Joined: Oct 2004
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From: Honolulu, Hawaii
2001 E55, 2002 ML55, 2002 SL500, 2003 CLK55
Haven't disassembled anything yet but when I'm in the car, engine running but nothing else on, I can hear a soft periodic hissing sound that starts and stops.
Could this be the vacuum pump and it's leaking?
Could this be the vacuum pump and it's leaking?
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From: Miami, FL
06 CLS55 Renntech stage 5, 04 CL600 ( will miss ),02e55 , 11 R350
One of two things, if you have the AC on , your low on Refrigerant, if not then it is the air pump for the ergonomic seats, but that should go away after few minutes, if not , then one of the lines is leaking, test the air pumps in teh seats first.
Thread Starter
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From: Honolulu, Hawaii
2001 E55, 2002 ML55, 2002 SL500, 2003 CLK55
Forgot to mention that it's seems like the sound is coming from the rear passenger side seat area.
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From: Lexington Kentucky
2000 E55, 2007 2500 Duramax Crew 4x4, 2006 CTS
rennworks i had the same problem on my noise in the back seat coming from the pump. It was the passenger side lumbar had a leak, which made the pump run continuesly.
Andy
Andy
Thread Starter
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From: Honolulu, Hawaii
2001 E55, 2002 ML55, 2002 SL500, 2003 CLK55
How did you identify the leak?
