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Yeah, it is just showing that code and says running too lean bank 2 idle - there is a little rattle as well. I noticed the rattle on my way back home even before the light came on and then the light started to flash as soon as I entered my driveway.
I did have the O2 sensor code flash a week back with the check engine light coming on solid, but then it just disappeared so thought it was a 1 time thing but today it rattled (and the engine light blinked/flashed)
A reported lean condition is because of too little fuel and/or too much air. Bad injector? Air leak? Bad A/F (O2) sensor?
A smoke test should show if you have an air leak on the engine side of your MAF/MAP. Not sure if a bad injector would throw a code, but maybe. Best to get your OWN Mercedes-specific scan tool and do some of your own diagnosis instead of relying on what the service manager or the Advance Auto employee tells you. A dealer's solution is to always replace something that is expensive.
Is P2179 the complete code? Mercedes usually uses 6 digits following the letter.
Thats exactly what the dealership ended up doing in the first place.
At first I had an engine misfire on 3 cylinders, so i took it to them - they charged me $1100 for Sparkplugs + Diagnostics. Within a week I had the O2 sensor code and again engine misfires! I have complained to Mercedes Benz Canada Since and they're reviewing the case right now.
Lets hope they come back with something more concrete.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Originally Posted by VarunBajaj
Thats exactly what the dealership ended up doing in the first place.
At first I had an engine misfire on 3 cylinders, so i took it to them - they charged me $1100 for Sparkplugs + Diagnostics. Within a week I had the O2 sensor code and again engine misfires! I have complained to Mercedes Benz Canada Since and they're reviewing the case right now.
Lets hope they come back with something more concrete.
Can you say, "BOHICA"?
Oh, wait! Are those Canadian dollars? Still, that hurts when they don't fix the problem.
Little update on whats happening, Mercedes Canada refused to back the customer and sided with the dealership (very disappointing) I have sworn off not to get another 3 pointed star after this.
I am just going to take the car to a local shop and get it fixed and bite the bullet. It is so disappointing that the company is not ready to help its customers here.
Little update on whats happening, Mercedes Canada refused to back the customer and sided with the dealership (very disappointing) I have sworn off not to get another 3 pointed star after this.
I am just going to take the car to a local shop and get it fixed and bite the bullet. It is so disappointing that the company is not ready to help its customers here.
I am sorry to read about your poor experience from the Mercedes dealer network.
$1000 was only a polite abuse.
Not all MISFIRES are simple to fix:
ignition + injection + timings.
Somebody is going to have to :
read all chassis faults
read fuel pressures
read fuel trims
Lets us know what normal service was done/missing. Stupid dry idlers can cause misfire with overheated slippery serpentine.
Last edited by CaliBenzDriver; Jul 10, 2024 at 05:26 PM.
I am sorry to read about your poor experience from the Mercedes dealer network.
$1000 was only a polite abuse.
Not all MISFIRES are simple to fix:
ignition + injection + timings.
Yeah! Guess I got off easy, my issue though was not with the $$, it is with the fact that they did not diagnose anything. I went in with misfires, the obvious conclusion is to change sparkplugs! And now the misfire is back and Mercedes says, deal with the dealership. How do I go back to the dealership after complaining about them to Mercedes!? I can never trust em now!
Yeah! Guess I got off easy, my issue though was not with the $$, it is with the fact that they did not diagnose anything.
I went in with misfires, the obvious conclusion is to change sparkplugs!
And now the misfire is back and Mercedes says, deal with the dealership.
How do I go back to the dealership after complaining about them to Mercedes!?
I can never trust 'em now!
... you've got that right!
Find the local Indie everyone goes to when they are serious about getting their car to work.
At least the indie has fewer deep pockets to fill with unnecessary work.
It is always only up to you to call for the maintenance you want performed. Flush rear brake lines and apply external protection to prevent standard rust puncture.
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Can you say, "BOHICA"? 
