AC Problems
MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
Likes: 16
300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
HAVE
you ran the a/c diagnostics program in your climate control?
Is your ec light on and you can;t turn it off?
Start there. If you are not aware that cars since late 1993 run R134a not R12,you might want to do the above and get more of an idea of what you need to do.
Is your ec light on and you can;t turn it off?
Start there. If you are not aware that cars since late 1993 run R134a not R12,you might want to do the above and get more of an idea of what you need to do.
Newbie
Joined: Mar 2008
Posts: 13
Likes: 0
From: Naperville, IL
1999 E320
ohlord,
Thanks for the reply. Sorry if this is in some faq someplace but how do I run diagnostics on the climate control? I will do more research once I get home. The EC light is not on and I can press it and turn it on and off.
Thanks.
Thanks for the reply. Sorry if this is in some faq someplace but how do I run diagnostics on the climate control? I will do more research once I get home. The EC light is not on and I can press it and turn it on and off.
Thanks.
Newbie
Joined: Jun 2009
Posts: 5
Likes: 0
mercedes
2000 E320....A hiss sound when turn on the fan AC....
Hi All
My car is 2000 E320 , When I turn on the AC fan at low speed , I hear a hiss sound come from front air blow....What's wrong???.Please help me ......Many Thanks..
Johnny...
My car is 2000 E320 , When I turn on the AC fan at low speed , I hear a hiss sound come from front air blow....What's wrong???.Please help me ......Many Thanks..
Johnny...
MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
Likes: 16
300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Most likely cause
low r134a, give it a check by running your onboard climate control diagnostics.
http://www.eclassbenz.com/node/27
post the values 1-8
either that or dirty cabin filters.
http://www.eclassbenz.com/node/27
post the values 1-8
either that or dirty cabin filters.
MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
Likes: 16
300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Thanks
I will do that. Our 17 yo girl graduated from high school this afternoon and turns 18 in 10 minutes
Member
Joined: Nov 2001
Posts: 191
Likes: 0
From: Dallas
1999 E 320 (sold), 2015 AUdi S5 (sold) 2005 CLK55 Cab, 2016 Honda Pilot Elite, 2011 Jaguar XF
'99 E320 Slow leak and A/C not working now
2 years ago there was a slow leak in my AC and when recharged it would go about 9-12 months before the EC (economy) light would come on in order to shut compressor off and save it from damage. Dye test couldn't find leak.
2 months ago I had it recharged and today the EC light came back on and no cold air. Just minutes before it came on the AC was blowing very cold.
Any thoughts on where to go from here? Thanks.
2 months ago I had it recharged and today the EC light came back on and no cold air. Just minutes before it came on the AC was blowing very cold.
Any thoughts on where to go from here? Thanks.
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MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
Likes: 16
300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Fii the system
with r134a and get an electronic sniffer form harborfreight tools, sometimes on special for under 50 bucks.
You will find the leak.
After repair run the onboard diagnostics in the climate control panel
http://www.eclassbenz.com/node/27
to see if you have anyother issues lurking in the wings.
I have used with warranty and new with warranty compressors if you discover it is the culprit.
You will find the leak.
After repair run the onboard diagnostics in the climate control panel
http://www.eclassbenz.com/node/27
to see if you have anyother issues lurking in the wings.
I have used with warranty and new with warranty compressors if you discover it is the culprit.
Newbie
Joined: May 2009
Posts: 1
Likes: 0
1999 E320
A/C problem
Hi guys,
My A/C in my 99 E320 is acting up. Passenger side of dash is blowing cold but the driver side is blowing much hotter air.
My sensors values are:
1 120
2 116
3 125
4 112
5 150
6 181
7 11
8 127
my codes are:
B 1234 and B 1459
Thanks for any help.
Em
My A/C in my 99 E320 is acting up. Passenger side of dash is blowing cold but the driver side is blowing much hotter air.
My sensors values are:
1 120
2 116
3 125
4 112
5 150
6 181
7 11
8 127
my codes are:
B 1234 and B 1459
Thanks for any help.
Em
Junior Member
Joined: Apr 2007
Posts: 20
Likes: 0
02 E430 4matic 07 E550 4matic
ec button
Does anyone know if there is a need to reset ec button after evac and recharge of ac system, I had to put in a barrowed ac control unit to get the ac working again so I ques there might be a way to reset my own control unit or I might just need a new one.
Thanks for any help.
Thanks for any help.
MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
Likes: 16
300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Run the diagnostics
both of you as stated in the http://www.eclassbenz.com/node/27
don't let it run till operating temp of 180 which I see is what you did.
Sensor 5 evap sensor is throwing a temp that will shut down the ac to protect the compressor. So run the tests just as shown and post the values.
From the 150 value for evap sensor it looks to be the culprit.
Post them when you got them.
don't let it run till operating temp of 180 which I see is what you did.
Sensor 5 evap sensor is throwing a temp that will shut down the ac to protect the compressor. So run the tests just as shown and post the values.
From the 150 value for evap sensor it looks to be the culprit.
Post them when you got them.
MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
Likes: 16
300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Try
http://www.eclassbenz.com/node/27
run the tests just like it tells you.
Post the values and errors.
What are your symptoms?
system working but not cold as you like?Etc.
when did it show the symptoms
run the tests just like it tells you.
Post the values and errors.
What are your symptoms?
system working but not cold as you like?Etc.
when did it show the symptoms
Newbie
Joined: Jun 2009
Posts: 8
Likes: 0
'99 E320
99 E320 A/C is acting up. Passenger side blowing cold but the driver side does'nt
My '99 E320 is not blowing cold air on driver side but passenger side is really cold. I have looked around on the web but no real solution.
Has any of our members or anyone for that matter come across this problem and if so any luck in solving the issue?
I have looked at www.eclassbenz.com/node/27 and my reading is somewhat similar to others and it is as follows:-
1. 98
2. 103
3. 82
4. 75
5. 123
6. 186
7. 13
8. 138
following
eb1231
eb1234
eb1459
e ff
However the site does not provide a real soultion to the problem, that is, how to go about fixing it.
I would really appreiciate if anyone can help.
Thank you kindly.
Has any of our members or anyone for that matter come across this problem and if so any luck in solving the issue?
I have looked at www.eclassbenz.com/node/27 and my reading is somewhat similar to others and it is as follows:-
1. 98
2. 103
3. 82
4. 75
5. 123
6. 186
7. 13
8. 138
following
eb1231
eb1234
eb1459
e ff
However the site does not provide a real soultion to the problem, that is, how to go about fixing it.
I would really appreiciate if anyone can help.
Thank you kindly.
Last edited by 99e320sam; Jun 27, 2009 at 05:16 PM. Reason: mistake
MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
Likes: 16
300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
The ec light is off
try the test again when the engine is cold and follow the diections to start it run 3 minutes and proceed with the test.
Your coolant temp is 186f so you must have ran the test with the car well warmed up.
Post the results when you have them. And then while in error mode clear the errors by hitting both auto buttons at the same time.
From the posted values you look to be low on 134a you could toss in a can and run the tests again. Also give the duo valve a tap on both sides with the handle of a screw driver. That often frees a stuck duo valve and the different temps on both sides issues.
Run the tests again properly since the evap temp sensor is showing a default temp. Easy diy. if it is.
Your coolant temp is 186f so you must have ran the test with the car well warmed up.
Post the results when you have them. And then while in error mode clear the errors by hitting both auto buttons at the same time.
From the posted values you look to be low on 134a you could toss in a can and run the tests again. Also give the duo valve a tap on both sides with the handle of a screw driver. That often frees a stuck duo valve and the different temps on both sides issues.
Run the tests again properly since the evap temp sensor is showing a default temp. Easy diy. if it is.
Newbie
Joined: Jun 2009
Posts: 8
Likes: 0
'99 E320
where is the duo valve located
Thank you kindly for your reply.
I was wondering where I would find the duo valve in my '99 E320.
Also I redid with cold engine, started the car and waited 3-4 minutes and took the reading as follows:-
1. 89
2. 91
3. 80
4. 71
5. 120
6. 118
7. 11
8. 120
and
eb1231
eb1234
eb1459
e ff
Thanks once again
I was wondering where I would find the duo valve in my '99 E320.
Also I redid with cold engine, started the car and waited 3-4 minutes and took the reading as follows:-
1. 89
2. 91
3. 80
4. 71
5. 120
6. 118
7. 11
8. 120
and
eb1231
eb1234
eb1459
e ff
Thanks once again
MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
Likes: 16
300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Does the
ac ever just blow regular temp air(not chilled) like after 10 minutes or so?
Cuz that 120 for the evap sensor is way high. Should be around 38-42f
so you may have other issues besides low r134a. Start with a partial can.
Give the duos a firm drum like thunk up aside the head
and get back to us after you do that and clear the error codes.
Cleaning the duo valves(most times the thunk frees them up)
is a diy posted on www.benzworld.org
w210 diy section so you can see where they are located as described above by our esteemed TMallison he know his stuff
Cuz that 120 for the evap sensor is way high. Should be around 38-42f
so you may have other issues besides low r134a. Start with a partial can.
Give the duos a firm drum like thunk up aside the head
and get back to us after you do that and clear the error codes.
Cleaning the duo valves(most times the thunk frees them up)
is a diy posted on www.benzworld.org
w210 diy section so you can see where they are located as described above by our esteemed TMallison he know his stuff
Last edited by ohlord; Jun 28, 2009 at 01:48 PM.
Newbie
Joined: Jun 2009
Posts: 5
Likes: 0
mercedes
Hi
Thanks for reply.....System is COLD... but sometimes I heard the HISS SOUND from the CENTER BLOW at LOW FAN SPEED.....I replaced the CARBIN FILTER....still HEARD the HISS..May be Low FREON , Do you think ?....If yes... Please help me.... How to check FREON on the system ?
Please reply ...many THANKS...Johnny...
Thanks for reply.....System is COLD... but sometimes I heard the HISS SOUND from the CENTER BLOW at LOW FAN SPEED.....I replaced the CARBIN FILTER....still HEARD the HISS..May be Low FREON , Do you think ?....If yes... Please help me.... How to check FREON on the system ?
Please reply ...many THANKS...Johnny...
MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
Likes: 16
300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Low r134a
equals hiss in vents.
RRun the tests post the values
punch them into the software program and then just add a partial can of r134a
since it is running cold it probably is just a bit low.
Low side fill port is up on the drivers side top of the engine on that aluminum tube. See the schrader valve
that is the one you want to use when you put a can in.
You don't need the ones with the fancy valves since the mb system is variable and gauges don't indicate fill.
The only way to get it dead on is pull the charge,evacuate the system and refill with the amount of proper oil and r134a as shown on the decal located on the plate by the ecu located on the passenger side back to the left of the engine.
You are just low so go the easy route. Just add a bit see if the hiss goes away. add a bit more if it does not.
You be the judge
RRun the tests post the values
punch them into the software program and then just add a partial can of r134a
since it is running cold it probably is just a bit low.
Low side fill port is up on the drivers side top of the engine on that aluminum tube. See the schrader valve
that is the one you want to use when you put a can in.
You don't need the ones with the fancy valves since the mb system is variable and gauges don't indicate fill.
The only way to get it dead on is pull the charge,evacuate the system and refill with the amount of proper oil and r134a as shown on the decal located on the plate by the ecu located on the passenger side back to the left of the engine.
You are just low so go the easy route. Just add a bit see if the hiss goes away. add a bit more if it does not.
You be the judge
Newbie
Joined: Jun 2009
Posts: 8
Likes: 0
'99 E320
will try and let you know
Thanks guys for your help. I will try all your recommendations and see what works.
Also, 'Oh Lord' it does blow regular temp air(not chilled) like after 10 minutes, if that means anything, let me know.
Thanks once again kindly and I will keep you posted with the results.
Thanks a bunch.
Also, 'Oh Lord' it does blow regular temp air(not chilled) like after 10 minutes, if that means anything, let me know.
Thanks once again kindly and I will keep you posted with the results.
Thanks a bunch.
