Rough/Jerking E420 DIY success!
Thread Starter
Member
Joined: Feb 2007
Posts: 245
Likes: 11
From: Los Angeles
1997 E420
Rough/Jerking E420 DIY success!
Thanks once again to eveyone on these forums, I was able to complete another repair DIY style. I could have saved even more if I called autohaus for the part but was so excited after finding the problem that I ran down to the stealership in Beverly Hills. They did give me a 10% discount though.
Anyway, yesterday the car very suddenly became rough at idle... really almost bouncing/jerking around. Much worse than a rough idle from engine mounts or something. Got the codes read at autozone. One of the 4 errors was misfire on cylinder #5. Popped in a new spark plug. No luck. Swapped the ignition coil on #5 and #6 and the car still jerked but felt different. Started getting excited thinking I found the problem. Autozone code recheck elicited shouts of glee with a misfire on #6. Couldn't wait to put on the new coil so did it in the parking lot of the dealer in about 3 minutes. Running smooth as silk again!
Here are the original codes:
P0305 - misfire on #5
P0507 - IAC cirucuit condition or idle speed too high/low
P0115 - ECT (Engine coolant temp) circuit
P1747 (didn't look this up yet)
Will the codes clear on their own after time now that it's fixed, or do I need to stop by autozone to clear?
Are all the above codes likely to be related to the misfire/ignition coil?
Thanks again guys for all the help and advice here.
Anyway, yesterday the car very suddenly became rough at idle... really almost bouncing/jerking around. Much worse than a rough idle from engine mounts or something. Got the codes read at autozone. One of the 4 errors was misfire on cylinder #5. Popped in a new spark plug. No luck. Swapped the ignition coil on #5 and #6 and the car still jerked but felt different. Started getting excited thinking I found the problem. Autozone code recheck elicited shouts of glee with a misfire on #6. Couldn't wait to put on the new coil so did it in the parking lot of the dealer in about 3 minutes. Running smooth as silk again!
Here are the original codes:
P0305 - misfire on #5
P0507 - IAC cirucuit condition or idle speed too high/low
P0115 - ECT (Engine coolant temp) circuit
P1747 (didn't look this up yet)
Will the codes clear on their own after time now that it's fixed, or do I need to stop by autozone to clear?
Are all the above codes likely to be related to the misfire/ignition coil?
Thanks again guys for all the help and advice here.
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Joined: Apr 2007
Posts: 6,171
Likes: 16
300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Some
have no connection to the misfire issue
P1757 Electronic Gear Selector Module: Defective Interaction of CAN with control unit A1(instrument cluster)mercedes specific
It will reset and clear the conditions that you fixed,so drive it and in a few days of drive cycles or do my generic drive cycle procedure and then read the codes again and see what is still active if the light remains on.
Why not go to http://www.harborfreight.com/cpi/cta..._stores.taf#CA
take a copy of the internet ad for the $39 94169 scanner obd2 w/can
and then you will always have the handy tool when you need it
Reads,erases,reads I/M status.
ohlord
P1757 Electronic Gear Selector Module: Defective Interaction of CAN with control unit A1(instrument cluster)mercedes specific
It will reset and clear the conditions that you fixed,so drive it and in a few days of drive cycles or do my generic drive cycle procedure and then read the codes again and see what is still active if the light remains on.
Why not go to http://www.harborfreight.com/cpi/cta..._stores.taf#CA
take a copy of the internet ad for the $39 94169 scanner obd2 w/can
and then you will always have the handy tool when you need it
Reads,erases,reads I/M status.
ohlord
Thread Starter
Member
Joined: Feb 2007
Posts: 245
Likes: 11
From: Los Angeles
1997 E420
I was thinking of your advice and wished I had one during my 4 trips to autozone today! I think that I will pick one up. Would have saved me at least an hour and a lot of fretting overnight before taking on the job today when they were open.
I also added some info to point people in the direction of harbor on EverythingBenz under searches like check engine light or P0305.
I am going to add functionality so that that queries that include the error code show the code description at the top of the results.
Let me know if you object to being credited on the site for the scanner recommendation, ohlord!
I also added some info to point people in the direction of harbor on EverythingBenz under searches like check engine light or P0305.
I am going to add functionality so that that queries that include the error code show the code description at the top of the results.
Let me know if you object to being credited on the site for the scanner recommendation, ohlord!
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.
Not at all
Also put me on top of the list for the $28 17mm must have spark plug boot removal tool and the $40 special 722.6 transmission dipsticks that I have for sale with tips on the plugs and the trans fluid change
I keep pointing people to your new site and when you fine tune it it will really be a great resource!
Hey at least you have an autozone that will let you get the codes.One member on benzworld had autozone tell them they did not have a scanner for European cars
I keep pointing people to your new site and when you fine tune it it will really be a great resource!
Hey at least you have an autozone that will let you get the codes.One member on benzworld had autozone tell them they did not have a scanner for European cars
Last edited by ohlord; Mar 22, 2008 at 03:38 AM.
Senior Member
Joined: May 2007
Posts: 311
Likes: 0
From: Brooklyn NY
'00 S-500, E-430S, '88 Mustang
have no connection to the misfire issue
P1757 Electronic Gear Selector Module: Defective Interaction of CAN with control unit A1(instrument cluster)mercedes specific
It will reset and clear the conditions that you fixed,so drive it and in a few days of drive cycles or do my generic drive cycle procedure and then read the codes again and see what is still active if the light remains on.
Why not go to http://www.harborfreight.com/cpi/cta..._stores.taf#CA
take a copy of the internet ad for the $39 94169 scanner obd2 w/can
and then you will always have the handy tool when you need it
Reads,erases,reads I/M status.
ohlord
P1757 Electronic Gear Selector Module: Defective Interaction of CAN with control unit A1(instrument cluster)mercedes specific
It will reset and clear the conditions that you fixed,so drive it and in a few days of drive cycles or do my generic drive cycle procedure and then read the codes again and see what is still active if the light remains on.
Why not go to http://www.harborfreight.com/cpi/cta..._stores.taf#CA
take a copy of the internet ad for the $39 94169 scanner obd2 w/can
and then you will always have the handy tool when you need it
Reads,erases,reads I/M status.
ohlord
And good thing that i printed the price of this thing ...cuz i was about to pay 75$$$!!! for it....then i showed the guy the internet special....and he honored that price...WooooooHoooooo!!!
So now that i got this scanner ...where to hell do i plug this thing into???
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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.
above where your left knee is about
to the left of the steering wheel on the leading edge of the knee bolster.open the car door and kneel under the dash and you will see a little black plastic flip door.Key off plug in the scanner should light up,hit read or follow the simple directions to retrieve the active and pending codes,write them down and post them for all to analyze
then hit erase and go about solving the problem.
ohlord
then hit erase and go about solving the problem.
ohlord
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Senior Member
Joined: May 2007
Posts: 311
Likes: 0
From: Brooklyn NY
'00 S-500, E-430S, '88 Mustang
So i plug in my new gizmo----30 sec i get
KWP 2000, then another 40 seconds go by and i get
ISO 9141
and 10 sec after that reading, I get ____@@@ LINK ERROR!
What the hell
........I checked my connection again ...and same thing.All this with the key out of the ignition??
MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
make
sure it is plugged in fully,key in ignition just in off position,then turn to on position not start.Should read.
ohlord
ohlord
Senior Member
Joined: May 2007
Posts: 311
Likes: 0
From: Brooklyn NY
'00 S-500, E-430S, '88 Mustang
Althou, thats a bit strange cuz my EC light is on when i have the heater on, and from what I have read here before, it means something might be wrong with the A/C or something.....so i dont know why theres no code for that .....
MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
That is
not in the obd2 system that is part of the climate control diagnostics.Can you shut the ec light off?if not you have no a/c.
ohlord
ohlord
Senior Member
Joined: May 2007
Posts: 311
Likes: 0
From: Brooklyn NY
'00 S-500, E-430S, '88 Mustang
so i have no A/C now.
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.
Turn
down the climate control to low and see if the ec light goes out when you tap it.
If it does go off,run the diagnostics
http://www.eclassbenz.com/node/27
post the values and the errors.
If it does not go off,your compressor is not running and most likely you have a leak in the system and all or most of the r134a is gone and you will need to have the leak located and fixed and the system recharged.SOme people try to do it themselves however with a big enough leak to lose it all you may be better off having a shop do it.
If it does go off,run the diagnostics
http://www.eclassbenz.com/node/27
post the values and the errors.
If it does not go off,your compressor is not running and most likely you have a leak in the system and all or most of the r134a is gone and you will need to have the leak located and fixed and the system recharged.SOme people try to do it themselves however with a big enough leak to lose it all you may be better off having a shop do it.
Senior Member
Joined: May 2007
Posts: 311
Likes: 0
From: Brooklyn NY
'00 S-500, E-430S, '88 Mustang
down the climate control to low and see if the ec light goes out when you tap it.
If it does go off,run the diagnostics
http://www.eclassbenz.com/node/27
post the values and the errors.
If it does not go off,your compressor is not running and most likely you have a leak in the system and all or most of the r134a is gone and you will need to have the leak located and fixed and the system recharged.SOme people try to do it themselves however with a big enough leak to lose it all you may be better off having a shop do it.
If it does go off,run the diagnostics
http://www.eclassbenz.com/node/27
post the values and the errors.
If it does not go off,your compressor is not running and most likely you have a leak in the system and all or most of the r134a is gone and you will need to have the leak located and fixed and the system recharged.SOme people try to do it themselves however with a big enough leak to lose it all you may be better off having a shop do it.
Ill do that today and post my findings.
