Yuille36

Trust me, I'm sweating this one bit. I just wished that they had fixed this the first day. I don't even look for the check engine light, if it comes on, its going back to the dealer. And there going to fix it period.

Roswell

+63... very well said Zephyr... after i had my first CEL, I became paranoiac... I was afraid it would pop up again or get a lemon... it took away my joy of owning an AMG... it's not acceptable for this type of car. But all is good so far!!

ergon

Will taking the charcoal filters out trigger a check engine light?

Merc63

If you get "Lean bank 1 or 2" codes again, its an Intake Manifold leak. Its a known problem with the M156, so is that purge valve. The original purge valve wasn't manufactured to spec. Also the intake bolts are different now I believe.

I had this problem for months.. They replaced the valve and it still came back on.. Finally they listened to me and checked the intake manifold gasket, sure enough it was leaking all over the place. New one on now and haven't seen that code come back on..

Case1906

Driver, not a mechanic here. What is the impact of a purge valve that is stuck open? Seems to not effect performance of our cars. What is happening?

BO Knows

No, not for me.

Surge

So on my brand new 2015 C63 coupe… day 2 of ownership with 100 miles on the clock, the CEL came on…

This, after the battery ran low on its way over here and the rear sam had to be replaced. There were unusually cold temps in Halifax, so the car sitting in a lot at -40 C / -40 F (!) probably brought the battery voltage too low and it affected the rear sam.
Anyway, rear sam replaced so that seems fine.

CEL light on but car seems to drive as normal, and idle seems fine. A bit lumpy but that seems like how these cars are.

Should I have them check the purge valve and the intake manifold for leaks? Can I do either myself?

Roswell

Just bring it in & let them take care of it, it's a brand new car u don't need to fix it on ur own.

abcut973

If the car is new bring it back to the dealership. They should be taking care of it. If you are curious about it you can still use an OBDII scanner and pull the codes.

Surge

Thanks. Code is the P0410 Secondary air injection.
Can someone tell me where the fuse and relay are for this pump? Have searched the forum but not found it for the W204 C63.
Thanks

Roswell

Trying to fix it urself might void the warranty, the deslership might blame the damage on u.. I wouldn't bother or risk it. Take it in, let them worry about it. Just my opinion though.

abcut973

Your car being new I doubt it is a faulty pump or relay unless you have tough luck. Do you hear the pump kicking in at start up? It sounds like a vacuum cleaner. If not then you have probably a faulty relay or pump.
Where are you located? Usually the P0410 is triggered because of the weather. Cold weather will create moisture in the check valve. Once weather is warm that issue disappears.
Either way I call on member JvanBrecht. He used to(had) this issue on his 09 sedan. He knows better where the relay is. I haven't had an opportunity to work on this but I would say the relays are in the black box close to the firewall under the hood (on the driver side).
But I agree with Meng. Why bother when you have a factory warranty

jvanbrecht

Good memory

Yes, I have it still, for me, it is not the relay, my pump kicks in just fine. It is my passenger side secondary O2 sensor (I have the sensors, but just don't have the time to change it out with my wife working weekends and me having a 2.5 year old kid, that and my car living at an airport parking lot 5 days a week).

It could be anything honestly, I did replace my check valve in the beginning, the pump worked fine, and I replaced a couple of hardline hoses that were cracked before I narrowed it down to the O2 sensor. The code you are getting is a generic one that regular readers pickup, even Autoenginuity picked up the Generic. You really need the Star tool and associated accessories to go way down into the subsystems.

Surge

I cleared it and it's fine so far.
I live in Toronto, so it gets cold. Car came in and was stuck in port at Halifax for weeks -40F!

Surge

Light back on, same code, on a cold start this morning. Thing is that the pump works - and I heard it stop, I'm sure.

So what could it be? Loose hose on the pump or somewhere else?

I always prefer DIY vs dealer visits. The dealer has been great so far, but he's also far from where I live. So would rather try to figure it out myself.

abcut973

As mentioned above you need a scanning tool able to pinpoint the culprit (pump/lines/hoses/etc...) I'm a DIYer as well but would take the time to schedule an appointment with the dealership since the car is new. You don't want to void your warranty at that stage of your ownership. And that problem shouldn't not happened so early.

Surge

Thanks. The obd2 scanning tool just shows secondary air intake fault.
Air Pump is working and shutting off. Any ideas?

abcut973

If your tool can give you the O2 sensors current you should check during cold start if your current gets corrected.
Could be your pump kicks in but you have a faulty valve .

Surge

Purge valve?
Thanks!

abcut973

No not purge valve, the check valves which prevent the exhaust gas back into the pump.

jvanbrecht

Unless you have the software, you are not going to be able to do much.

I went with Autoenginuity (I found someone on Ebay with the MB module), and paid AE the $50 for updates. While I got the same code, what I was able to do with AE, is actuate the different components, and monitor voltage levels. After testing the pump, check and diverter valves, I monitored the voltages on the sensors. For me, passenger side secondary had a static voltage regardless of idle, or lightly reving the engine, where the other 3 fluctuated with similar values all over the place. Hence busted O2 sensor.

Without the appropriate tools, you can only read the codes, you cannot test anything. If you truly want to DIY, I suggest you invest in tools and software.

AE with the MB enhancement will set you back around $480 plus taxes and crap.

You can probably pickup a Star Clone and laptop for similar, but since I have other cars (Nissan and Infinity, prior I had a Jeep), I went with something that would work for me and support multiple brands, that was AE.

There are also some hardware readers that suppor bi direction, but now your getting into the $1k and up price tag. http://www.launchtechusa.com/assets/.../products.html
I was looking at these for a while, and from teh videos I found online, they look pretty slick, and seem to work, but the major complaints I have seen involve licensing and activation and the problems people have had. Also, there translations to English.. absolutely horrid. Support might be an issue as well.

Surge

Thought the secondary air injection system code (P0410) had cleared on its own this morning. Drove around for about an hour with no issues.
Then, after 30 min or so I started her up to move cars around in my driveway.
Engine stuttered and threw random (P0300) and cylinder one misfire codes.

What could be causing both misfire and secondary air injection codes on a brand new engine ?! (250 miles)

Gas? It's 94 octane. Station had recently run out of gas so maybe it had water in it? Unlikely, because I drove around all day without issue.

Intake manifold leak?

O2 sensor(s)?

Diverter or check valve?

Surge

7 hours later and everything perfectly nornal. Reset the CIL and started her up and no light. Drove around and was totally fine.
What the?!
Anyone have experience with intermittent air injection and misfires on a new car?!

jvanbrecht

I finally got around to replacing my O2 sensors this weekend, cleared the codes. Drove around for abit. No issues, no CEL. Previous clearing before replacing the part resulted in CEL after about 5 min, so I am considering the issue closed for me.

Will see what happens when I get home on Thursday lol...

As for Surge, you have an update?.. Also, it's under warranty right, just take it in, don't bother diagnosing it yourself.

Surge

Yes, my issue seems to have been fixed. The tech at the dealer cleared the moisture out of the pump and ordered a new unit. Haven't got it yet but the light has not come back on.
The service advisor said they sometimes get moisture in the pump in cold conditions during delivery from Germany.