S600 Woes....
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Member
Joined: Nov 2005
Posts: 76
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From: City of Rose
210 E 55, 220 S 600
S600 Woes....
Ok, I am in hopes that someone can shed some light on to my situation...about a month ago, I started to get CEL, found out that I was having cylinder7,8,9 were misfiring....gone through whole bunch more test and came to conclusion that I needed to replace, the left bank coil pack, wiring harness (due to oil leak), o2 sensor, MAF sensor, plugs, and injectors.....after almost $5K in repair bill, it still misfiring in cylinder 8 and 9....I am totally lost here and so is my mechanic.....any advise would be hugely appreciated it. Help out a fellow member please...any certified technicians out there with some idea?
Thanks in advance.
Thanks in advance.
Super Member
Joined: Jan 2008
Posts: 508
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From: california high desert
2003 S500, 03 C240, 03 E320, 03 tahoe
not a cert MB tech,just a mech
it looks like your mech tried to eliminate anything that would cause the misfire.did he verify the voltage signal to the injectors?.the fact that you picked up one of the down cylinders but replaced more than that specific injector leads me to question the injector harness or the signal it transmits.all the parts you have replaced are related to misfire other than O2 which was probably damaged from a rich,miss fire mixture.ALL good mechanics keep learning all the time.You might consider taking it to a dealer where they have access to the electronic troubleshooting equipment to "pinpoint" the issue.and if it stumps them they have access to regional reps,than the factory.the amount of skill and experience the dealers have cant be disputed.im eliminating spark from the problem based upon the simplicity of determining if it is present and timed correctly,plus you replaced the suspect parts.this entire issue could be caused by a engine management computer,tough for your ind mech.dont flog your mech,just let him know what it turned out to be.
Thread Starter
Member
Joined: Nov 2005
Posts: 76
Likes: 0
From: City of Rose
210 E 55, 220 S 600
thanks....
it looks like your mech tried to eliminate anything that would cause the misfire.did he verify the voltage signal to the injectors?.the fact that you picked up one of the down cylinders but replaced more than that specific injector leads me to question the injector harness or the signal it transmits.all the parts you have replaced are related to misfire other than O2 which was probably damaged from a rich,miss fire mixture.ALL good mechanics keep learning all the time.You might consider taking it to a dealer where they have access to the electronic troubleshooting equipment to "pinpoint" the issue.and if it stumps them they have access to regional reps,than the factory.the amount of skill and experience the dealers have cant be disputed.im eliminating spark from the problem based upon the simplicity of determining if it is present and timed correctly,plus you replaced the suspect parts.this entire issue could be caused by a engine management computer,tough for your ind mech.dont flog your mech,just let him know what it turned out to be.
Super Member
Joined: Jan 2008
Posts: 508
Likes: 1
From: california high desert
2003 S500, 03 C240, 03 E320, 03 tahoe
if you are in so cal
i only take our cars to the dealer when it is a situation like yours.their labor rate is high but you cant let yourself think that they will intentionally rip you off.I am loyal to MB of escondido,Nate is a great SA and keeps you informed.they would not want to get caught padding time/parts falsely,i dont believe they would even consider it at MB escondido or fletcher jones.hang in there,fix it and put it in the past.
Thread Starter
Member
Joined: Nov 2005
Posts: 76
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From: City of Rose
210 E 55, 220 S 600
Dealer
i only take our cars to the dealer when it is a situation like yours.their labor rate is high but you cant let yourself think that they will intentionally rip you off.I am loyal to MB of escondido,Nate is a great SA and keeps you informed.they would not want to get caught padding time/parts falsely,i dont believe they would even consider it at MB escondido or fletcher jones.hang in there,fix it and put it in the past.
Thread Starter
Member
Joined: Nov 2005
Posts: 76
Likes: 0
From: City of Rose
210 E 55, 220 S 600
Dirty Fuel.....
Well, I took your advise and took the car to the dealer yesterday, had a lengthy discussion with the service advisor and they seemed to think it would be a simple fix. They are having their shop foreman personally work on this car. It turns out that they knew all about my problems, since my indy mech has worked for years there and he has been calling there to get input while he was working on my car. I am in hopes that I get the car back today.....will let you know what the issue was. Thanks again for your advised and direction.....your willingness to share your knowledge and experience is the true essence of these types of forum.
Super Member
Joined: Jan 2008
Posts: 508
Likes: 1
From: california high desert
2003 S500, 03 C240, 03 E320, 03 tahoe
all the parts were wear items
your mech thru alot of probable fixes at the issue,he was close in the fact that he suspected the injectors,who would have ever thought to be so simple as debris in the fuel rail/injectors.fuel filters should prevent that.it is so hard somtimes for mechs to start with the most simple non component related cause such as contaminated fuel.he would have to R&R the fuel rail just on a hunch that their might be contamination.9 cylinders fired and 3 did not.i would have suspected electrical myself.you and your mech have built alot of reliability into the car and you wont have to worry about the new parts failing fo along time.
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Thread Starter
Member
Joined: Nov 2005
Posts: 76
Likes: 0
From: City of Rose
210 E 55, 220 S 600
thanks...
your mech thru alot of probable fixes at the issue,he was close in the fact that he suspected the injectors,who would have ever thought to be so simple as debris in the fuel rail/injectors.fuel filters should prevent that.it is so hard somtimes for mechs to start with the most simple non component related cause such as contaminated fuel.he would have to R&R the fuel rail just on a hunch that their might be contamination.9 cylinders fired and 3 did not.i would have suspected electrical myself.you and your mech have built alot of reliability into the car and you wont have to worry about the new parts failing fo along time.
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