P0025 2008 SL550
 

Driving back home and the dreaded CEL came on, stopped by Autozone and got it scanned and it issued this code. P0025 Exhaust Camshaft Position Timing - Over-Ratarded (Bank 2). Have any of had this issue and how was it resolved? I also noticed that Sport mode was engaged at the moment.

Thanks in advance.

Check out this guy's issue. It seems the same as yours.

Good luck!

https://mbworld.org/forums/m-class-w...ixed-pics.html

Thanks, I’ll check it...
The only thing is, that’s for a different vehicle, I’m not sure if it applies.

Replace Camshaft Adjuster Magnet
 

I'm pretty sure you need a camshaft adjuster magnet. I had the same thing go out on my '07, but on bank 1 (RH from drivers position). Fortunately, they are very inexpensive and very easy to install.



Visit this discussion for some great information from a few that understand this better.

https://mbworld.org/forums/sl-class-...rror-code.html

I’ve already ordered two, do you know if mine is on the passenger side, based on the description? I really need to do this myself. Thanks!

Go ahead and replace all four. It; scenario #2 in this TSB:

http://benzbits.com/BalanceShaftTSB.pdf

You will probably need to remove the oil cooler to replace the left bank exhaust so you'll need a gasket for that (plus you'll want to drain a bit of coolant so you don;t make a mess). Othewise, this is an easy job with just a bit of wrenching.

It is the exhaust on the LH (US Driver's) side. Take a few minutes to study the graphic that Rodney provided in post #12 in the link I attached above. It is very helpful.


Rodney, I've noticed that on a number of occasions, you have recommended replacing all four at the same time. What is your reasoning? It would seem reasonable to think that if one has failed the others may not be far behind, and they really aren't that expensive. Is there more to it?

The reason you have to replace any of them is that there was a manufacturing defect that causes them to fail. I think what happens is that oil gets inside of them and shorts them out. I guess you could replace them as they fail, but you can get all four for about $100, and other than the one behind the oil cooler, it takes just a few minutes to swap them, so why not just do them so you have no worries about future failures?

Understood! I’ll try to replace the ones I can reach and let my mechanic do the messy one, since I don’t have an adequate space to do the job.

On a side note, I drove the car this morning to work, it’s a 40 mile drive and once I arrived at work, the CEL is no longer displayed, maybe it’s a fluke, still replacing them before my appointment with the dealership on Saturday for alignment.

Update!
 

I went ahead and replaced the two by the drivers side, I think that the car drives fine, since replacing them, or maybe it’s in my head 🤣. I’ll be ordering two more for the passenger side. I read that it is advisable to also replace the “Camshaft Position Sensor”, when replacing the Camshaft Adjuster Magnets. Is that so? Amazon suggested those and I ordered two but my mechanic advices me not to do it, maybe it might require reprogramming. So, I still have them... Don’t want to rock the boat 😀

No, the sensors rarely fail. And they are costly - I think $200+ each. BTW, here's a diagram showing which solenoid throws which OBDII error. This is from the perspective of standing in front of the engine and looking back at the car. But, as I said, you really should replace all four as the original parts used were defective.

http://benzbits.com/m272/CamshaftSolenoidCodes.jpg

https://cimg0.ibsrv.net/gimg/www.mbw...d7987d7e8.jpeg
Thanks, I’ve already replaced two, and sure enough, I replaced the right ones, and I’ve already ordered two more for the other side. The sensor I was referring to, is attached below.

That's probably fake. Amazon and eBay are so full of fake Bosch parts, I;d never consider buying there. The OE part is over $150:

https://www.mercedespartsdelivered.c...QtMTUzLTk2LTI4

But like I said, those rarely fail.

Wow! I won’t install it. The Camshaft Magnets was shipped by a local Mercedes dealership by me.