JettaRed

iTrader: (1)

XENTRY is the official diagnostic tool used by Mercedes dealers. It not only does a deep scan of your car, it also has built-in diagnostic procedures. It is also used to do some configurations, resets, recalibration of certain functions. However, you limit what you do with it unless you are certain what you are doing. Doing a search of XENTRY will return lots of results. It is actually the software portion of the Star Diagnostic System comprised of a Windows 10 laptop, a C4 multiplexer with DoIP, and XENTRY. The multiplexers are usually Chinese clones, so you have to be careful what you get. The best place to acquire the components is to join the BenzNinja Club and get recommendations from @BenzNinja . Otherwise, you can search this forum for recommendations of a Mercedes-specific scanner.

Arrie

Swap them magnets first. Start with intake or exhaust camshaft first and then the other one to see if the problem moves to the other bank.

Should be an easy job.

GOPHIMBO

What magnets? are you talking about the camshaft position sensors at the first of the engine?

Arrie

So, misfires in all cylinders in the bank 1.

Some general “rules”:
- All three cylinders don’t lose compression suddenly at the same time.

- All spark plugs in the three cylinders do not fail at the same time.

- All fuel injectors in the three cylinders do not fail at the same time.

- All other ignition components on those cylinders do not fail at the same time.

So what do then cylinders have in common?

- Fuel injection yes, but the same fuel pump supply also the other bank cylinders that do not have problem.

- Cam shafts are the common parts that all these three cylinders use. It is most likely failure of a component of the VVT system. Could also be just a failure of the chain tensioner.

But the easiest thing to do and rule out at this point is to swap those magnets and see if the problem follows to the other bank.

And yes, Xentry is the tool to have. I joined the Ninja club and it is golden.

JettaRed

iTrader: (1)

But his misfires are on both banks. Cylinders 1 and 3 on Bank 1 and cylinder 5 on Bank 2.

S-Prihadi

Your engine is M272...correct ?
If M272, the air intake manifold is a ticking wallet buster .............. a matter of WHEN and not IF.


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Try to inspect these :

Improper mounting of air filter box :


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.
Clean your MAF and MAP.


This is MAF cleaning. Get a scanner to see the same PID in video.


Check your fuel pressure.
Scanner can do that too.

Misfire count on proper scanner is available too.


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I hope you did not get counterfeit COP and Plugs.
Nowadays bad sellers are too many.........





Good luck........