Hi all,

I have a E350 2015 with 140k on the dash. My car started doing some weird stuff. When I put it in to drive the car has a rough idle and and a few times it died. No errors found during or after the symptoms. Once I switch off the engine and turn it back again everything is fine so my guess its a sensor. I scanned the car today and nothing but did the test on the bank sensors and and some that failed. Any help about this or if someone had this issue and can help that would be amazing.

Thanks

 

I've never heard of a 'bank sensor' Pls explain what this is.

 

Oxygen sensors are laid out in banks, which refer to cylinders and in sensor numbers referring to before or after the catalytic converter. Bank1 or B1 refers to cylinders 1-3. Bank 2 or B2 refers to cylinders 4-6.

 

Go ahead and replace both banks PRIMARY sensors only! (2Pc total). After 110kMi lambda response is slow and impacts engine accelerations... No code, just lean accelerations.

How old is your PCV valve?

Another facelift V6 acting up with no code.... I wonder if MercedesBosch are trying to bypass OBD help in which case mechanics have to doctor engine data by themselves.

 

Thanks for the reply.

I am a newbie with MB problems as I never had any for the past 4 years. Which ones are the primary?

Thanks

 

I changed the crankcase breather valve last year as I found oil when changing the turbo intake seal and researched a bit and that one goes with time.

 

Primary Lambda are the one between engine and before cats. After than leave the secondaries alone.

With that being said lazy O2 are not going to totally screw up idle... how about turbo gates?

 

Thanks for that.

The are fine as they've been checked and the car has no power loss. Like I said when I switch the engine on and back on and put it into drive its perfectly fine.

 

Right, you have a temporary soft-crash that clears with a restart, the ECU is good at doing that.

I am very surprised your lambda fail test shown in OP and not trigger related code....

 

Throw away your iCarsoft and get Launch Creader Elite for MB. US$165 only.
No offence but , that iCarsoft is not worth its price vs its capability for Mercedes... by today offerings.

You are testing using OBD2 global mode, that test you did is OBD 2 mode 5.
Use Mode 6, don't use Mode 5.



https://x-engineer.org/on-board-diag...stic-services/

Do be aware that MB does not have to follow 100% OBD2 global protocol for all 10 modes. Depends on the MB car model and year of production.


=====================

I am attaching Mode 6 documents, from 2 car brands.






Have fun learning..............

 

That's what I was thinking.

Everything started since MB did the software update on the emissions. By the time I read about this software it was to late. Some people had to change the NOX sensors because of it. The other thing is its happening really random. At least I have somewhere to start from. When I come from holiday I will take my car in to garage anyway and will tell them to change the primary ones. Thank you for your help.

Regards

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Becareful with BAD scanners, it will cost you so much $$ lost on parts Cannon and frustration

 

Thank you all for the help and will have a go and learn mode 06 and see what I come up with.

Regards

 

The iCarsoft V3.0 is also not good right? I heard that it now does actuation tests...

 

I don't know about iCarsoft v3.0, as for me iCarsoft is not the brand I would use anymore.

You see , once you have a "naughty" Xentry and more so proper a fast one from Benz Ninja, you are seeing the maximum capability of how a scanner for MB car should be like and
that becomes the reference. Wired , not wireless. Locked to maximum a year 2020 MB I believed. Newer MB cars need scanner to be live on line to MB HQ, so no can't do.

I also got mid range Autel MS-906BT ( was US$1,600 when I bought it locally ) which is not bad but it can not do a 100% what Xentry can do and lacking of the data acquisition speed
my Xentry Benz Ninja version can. Bluetooth, wireless. US$700 for 2 years update, mine expired and I WILL NOT update at such crazy price. Better I buy a new one for that money. LOL.

I got others too, baby Launch Creader Elite for MB only, yep only MB cars. Under US$200. Wired. I am very fond of this one. Lifetime free update.
I recently got Xtool dongle only version, all brands and not too bad, cheap at under US$200. Bluetooth. Lifetime free update.

Don't think when a scanner said it can do bi-directional ( actuation ) it then can do all of the available actuation as per MB car using Xentry.
It does work like that. The more mature the 3rd party scanner software is, the more actuation it can do and the least garbage data it will produce.

There are times when each of these 4 scanners has its worth ( based on MB cars ), be it for convenience of smaller size to bring on long distance travel and simpler hardware ( no need laptop ) or wireless wise or capability wise.

So the question is, what do we want as a consumer/buyer of a 3rd party scanner for MB ...to what level of capability ?
Will we compare it to Xentry or compare it to a mid-level Autel or Launch ?

Now, 3rd party scanner performance towards MB cars is not all the same.
The more matured the software is for MB cars, the more reverse engineering work they must put into it, the more $$ they cost.
The good thing about big brand like Autel and Launch is, they have their much higher end models and they done so much reverse engineering on MB suitable software,
they then can afford to place that software into a cheapo dedicated baby sized scanner and lock that scanner to do only MB cars, example Launch Creader Elite for MB only.

Big brands sometime create 2nd cheaper brand in order to not "shame" their primary brand while selling cheaper.
Example Autel has I think Mucar brand , I hope I am correct it is Mucar.
Launch licence their "engine + software" to I believe ThinkTool and TopDon.

Here is an example of Mucar CDE900 Pro, very cheap at US$99
But the catch is, you pay extra to allow its capability to be unlocked and/or add car brands.
Google it, you will see how these brands is wiling to sell so cheap and hoping you will upgrade.

The part I hate the most about 3rd party scanner is, you wont know its true performance or capability until you buy it and test it on your car.
They may not be good across the entire range of W212 or entire range of MB cars models. You must test it.
The more exotic the MB car is, say rare AMG models, the more chance a 3rd party scanner will show its weakness often in the adaptation feature.

So there is no one 3rd party scanner you can rely on as a 100%.
They all have weakness and strength towards certain models of MB cars.