Problems & no one knows.
Last edited by ergon; Feb 15, 2012 at 03:34 PM.
Ding ding.
These dealers are useless I swear.. Have you replaced the purge valve already?
Its either the purge valve, it can get stuck open sometimes. It will need to be replaced and is easy. Or the Intake manifold gasket which is an extremely common problem on the M156..
The IM Gaskets would be the 1st thing I would check. However in my case they did not fix the issue.
I wont get into much detail but after talking with the MHP's new tuner during our dyno session my issue was 100% due to the tunesand nothing hardware related.
The C63's stock ecu file has settings pertaining to the TB only opening a certain percentage. An aftermarket tune obviously corrects this "detune" the car comes with from the factory. The issue stems from the incorrect metering of air. For whatever reason a lot of these files didn't have proper compensation for the increased airflow thus giving false "lean" conditions due to the file limiting the amount of airflow it can meter.
After the new file was flashed I have had absolutely 0 lean codes and the driveability is vastly improved at part throttle.
Kent
The IM Gaskets would be the 1st thing I would check. However in my case they did not fix the issue.
I wont get into much detail but after talking with the MHP's new tuner during our dyno session my issue was 100% due to the tunesand nothing hardware related.
The C63's stock ecu file has settings pertaining to the TB only opening a certain percentage. An aftermarket tune obviously corrects this "detune" the car comes with from the factory. The issue stems from the incorrect metering of air. For whatever reason a lot of these files didn't have proper compensation for the increased airflow thus giving false "lean" conditions due to the file limiting the amount of airflow it can meter.
After the new file was flashed I have had absolutely 0 lean codes and the driveability is vastly improved at part throttle.
Kent
Hmm, I have never seen anyone getting leans codes from the tune...
This is interesting.. So the ECU didn't have the correct capability to monitor the increase in airflow programmed?
Wouldn't this be a common problem that everyone with a tune would encounter?
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I had MB look at my car a few times and they decided to replace a singular maf sensor on that cylinder bank. After 50miles the problem still persisted. They then called me to let me know my old MAF (that was sent back to MB for testing) came back with 0 problems.
In my case the new tuner was able to raise the threshold for max calculated airflow and the problems have completely went away since.
My advice to the OP would be.
1. Put your stock filters and charcoals back in and double check for any intake leaks and make sure everything is tight. Do a battery pull and put some miles on the car and see if the issue persist.
2. Have the dealership check the IM gaskets.
3. Send the ecu back to Kleeman and have them reflash it.
Erich
I called Knoxville MB late yesterday and ask if they had run a smoke test to check for vacuum leaks and was told no they hadn't. I don't think they are capable of working on a C63.
Last edited by ergon; Feb 16, 2012 at 01:53 PM.
Guys here spray lighter fluid or something really flammable around the seal and have another guy check the idle.. IF it flutters, then the gasket is leaking..
I got a call from MB and was told they're putting an A.O.M. on it, Area Operations Manager.
If MBUSA decides that your modifications are somehow causing the issue(s), the fact that MB Buckhead sold the parts and did the install will have zero bearing on your vehicle's warranty status for this specific repair. Even worse, MBUSA might decide to "status 8" your vehicle, requiring all future repairs to be inspected by a regional rep before any warranty-repair approvals are granted.
Ultimately, the Buckhead SA you work with and/or dealership can go to bat for you, as a goodwill gesture, but if MBUSA says no - the dealership can decide to eat the cost of the repairs out of their own pocket (unlikely), or tell you sorry you're on your own (more likely).
Kleemann has a 1 year, unlimited mileage warrany on it's wares... IIRC. Not sure how long you've had the stuff on the car, however.
Good luck, and hope it's an easy fix for you.
If MBUSA decides that your modifications are somehow causing the issue(s), the fact that MB Buckhead sold the parts and did the install will have zero bearing on your vehicle's warranty status for this specific repair. Even worse, MBUSA might decide to "status 8" your vehicle, requiring all future repairs to be inspected by a regional rep before any warranty-repair approvals are granted.
Ultimately, the Buckhead SA you work with and/or dealership can go to bat for you, as a goodwill gesture, but if MBUSA says no - the dealership can decide to eat the cost of the repairs out of their own pocket (unlikely), or tell you sorry you're on your own (more likely).
Kleemann has a 1 year, unlimited mileage warrany on it's wares... IIRC. Not sure how long you've had the stuff on the car, however.
Good luck, and hope it's an easy fix for you.
Vehicle was purchased in Chattanooga.
Vehicle was taken to Buckhead outside of Atlanta for they have an approved MBUSA performance shop. That's where all work was performed and approved for coverage under MBUSA vehicle warranty. The work had to be performed by Certified Mercedes Techs in an Mercedes Approved Performance Shop.
The surgeon who owned the vehicle traded the car to Mercedes of Knoxville where it was CPOed and sold to me.
I have the paper trail. I know what it reads. Make sure you have your paper work. I'm a retired federal agent. I know the facts on this issue.
What position do you have with Mercedes?
I just spoke with Cory yesterday. And will speak with him again today. I think the world of him and his business. Oh, that's Kleemann.
Sorry son but you don't know what you're talking about. Mercedes can't revoke work they have approved. I had nothing done to the car but I've got the paper work.
Vehicle was purchased in Chattanooga.
Vehicle was taken to Buckhead outside of Atlanta for they have an approved MBUSA performance shop. That's where all work was performed and approved for coverage under MBUSA vehicle warranty. The work had to be performed by Certified Mercedes Techs in an Mercedes Approved Performance Shop.
The surgeon who owned the vehicle traded the car to Mercedes of Knoxville where it was CPOed and sold to me.
I have the paper trail. I know what it reads. Make sure you have your paper work. I'm a retired federal agent. I know the facts on this issue.
What position do you have with Mercedes?
I just spoke with Cory yesterday. And will speak with him again today. I think the world of him and his business. Oh, that's Kleemann.
Sorry son but you don't know what you're talking about. Mercedes can't revoke work they have approved. I had nothing done to the car but I've got the paper work.
Call them up. They will answer all your questions. I'm looking for help not ignorance.
What's an "after maker"?
I'm willing to bet its the IM mine didn't go for 40,000km then started leaking.
Vehicle was purchased in Chattanooga.
Vehicle was taken to Buckhead outside of Atlanta for they have an approved MBUSA performance shop. That's where all work was performed and approved for coverage under MBUSA vehicle warranty. The work had to be performed by Certified Mercedes Techs in an Mercedes Approved Performance Shop.
The surgeon who owned the vehicle traded the car to Mercedes of Knoxville where it was CPOed and sold to me.
I have the paper trail. I know what it reads. Make sure you have your paper work. I'm a retired federal agent. I know the facts on this issue.
What position do you have with Mercedes?
I just spoke with Cory yesterday. And will speak with him again today. I think the world of him and his business. Oh, that's Kleemann.
Sorry son but you don't know what you're talking about. Mercedes can't revoke work they have approved. I had nothing done to the car but I've got the paper work.
Call them up. They will answer all your questions. I'm looking for help not ignorance.
What's an "after maker"?



