Just bought the car recently. Got the P0025 Code. Sounds like cam magnets. Bought new cam magnets, and discovered my car already had the new version. Changed them anyway.

The magnets came in a kit with the oil cooler gasket and a Mann oil filter. The filter came with 5 o-rings. I found a spot for 3 of them. Are the other ones for different cars?
Also when I took the oil filter out it was just sitting in the housing. Seems like it was the completely wrong one put in. The oil change reminder sticker said Canadian Tire. That worries me a little. Good thing it was just done in December and was only driven a few hundred km.

The oil looked fairly clean, but does anyone think that the non-filtered oil may have something to do with the engine throwing the P0025 code?

Also, is the oil cooler gasket a common thing to change? I didn't do it because it looked like a Bit*** to get in there. I can't even put my hand between the fan and rad.

So I've got everything changed, but I haven't fired it up yet. waiting for tomorrow.

 

The oil filter should remain in the oil filter cap when you unscrew it from the oil cooler/housing. It should fit snuggly into the cap (black). There are generally 5 O-rings in the oil filter box. You only require 3 of them (2 on the center shaft of the cap and 1 at the cap base where it screws into the oil cooler/housing.
I do not know what the P0025 code refers to. I would have to look it up. But I had my oil cooler replaced because it leaked at about 125K miles. There was no error code associated with the failure.

 

Did it leak on the ground, or leak into the coolant?

 

The leak was toward the ground. I would notice oily residue on the underside of the car. It was mostly contained by the belly pan (shield) but some would blow rearward with the underbody air stream. The oil would run down the front of the engine beneath the cooler and then be blown around. I had oily bell housing, belly pan, and all the lower braces and hoses at the lowest points were oily. My primary issue was a crack in the cooler to the outside rather than an issue with internal seals/gaskets.

 

Looks like the car came from the factory with the new design magnets. I guess I should read more on the forums.

 

P0025 is one of the "scenario 2" faults covered by the "Balance Shaft" TSB:

http://benzbits.com/BalanceShaftTSB.pdf


The solution is to replace the camshaft solenoids (magnets) with the revised parts. But, there are a handful of reports I've seen in the forums where the errors return even with the new parts. I suspect they may have had a batch of bad new parts. Or, as Kevin suspects, it could be an oil issue since the adjusters themselves are hydraulically operated.

In case anyone needs it, here are the generic OBDII "P" codes and which solenoid they refer to:

http://benzbits.com/M272/CamshaftSolenoidCodes.jpg

 

If the errors return, I think it may be the actual chain is streatched perhaps.
It's been a couple of days since I changed the magnets, cold idle seems to be better, but other times it is a little rough. Once off idle it is smooth as hell with no signs of miss at all.
Maybe a person can't expect a digital controlled engine to run as smooth as one with a carb? Or is it because it is a high compresson engine?
Either way it runs just fine and has gobs of torque. No CEL in the first thousand km.

 

If the chain were stretched, you'd get a different error. P0025 = DTC 0064. According to SDS, the only cause for this is a bad solenoid (magnet). However, I have heard of some people with very dirty oil having solenoid-related errors. Also, there seems to be a Canadian recall for the wiring harnesses.

 

Right on, fingers crossed.

 

So since I found the oil filter was not installed properly I decided to get the oil sampled. It came back
high in titanium 385 ppm and high in glycol 0.0109%
The sample company said titanium is being used in some oil as an anti wear additive.
I am not 100% sure what make of oil the car had in it when I got it, but I put in Mobil 1 0W40 Euro Spec.
There was no sign of lead, or iron, so I am happy. The glycol might be the gasket in the oil cooler/filter
assembly (hopefully) I took another sample of oil right after changing it, so that will be the baseline of
my EuroSpec oil.
Any thoughts from the crowd?

 

That's a good pic Rodney. Thank you. What is the difference between the top row of codes and bottom? Does it just refer to if the timing is advanced versus retarded?

A service tech at the MBZ dealer where I bought my SL from when I asked about the codes popping up on the CLK said the exact same thing that it could be dirty oil affecting the magnets or a stretched chain (even though idle gear would be ok).

But something odd. My indy changed out my oil filter housing and cooler, but in the process changed the drivers side magnet. I was getting P0021 and P0022 at times and now it is gone. He said the magnet was "stuck" even though it was the updated part. I'm still getting P0012 on the passenger side along with P0011 now. I ordered a new magnet for that as well (and nothing blocking it from changing it myself). Note both my intake magnets were changed at the same time and they both had the first two digits as 14 (I assume meaning 2014) on the front plastic side of the magnet. I'm wondering about as Rodney said earlier about there being a defective production with the updated part at some time few years back.

 

None of the eight possible errors indicate whether the camshaft is advanced or retarded. They just indicate that the adjuster is in the wrong position.

I believe he is mistaken about a stretched chain causing this. A stretched chain should appear as "retarded" fault codes on all cams, but you'd probably hear a horrible racket from the timing case before you got errors. Balance shaft failure only creates retarding of the right bank because the left bank stays in sync, but the right bank lags behind due to a change in the effective length of chain between the cams as the idler sprocket wears and gets smaller. This can also cause some noise in the timing case.

I've seen about a dozen or so instances of this even after the magnets were changed to the revised parts. I think in all cases, at least where the forum member posted a follow-up, replacing magnets fixed it.

 

That's what I figured and I let the car sit for a few days couple of times and did not hear any clanking, metallic, or racket noises at startup.

The P0021 and P0022 have not returned since. I just changed out the passenger side intake one myself since it was throwing P0011 and P0012 codes. The magnet even though updated was definitely not smooth the little metal pin inside and was getting stuck. I replaced with a new and cleared it and it's all good so far. I checked and both my old ones had the digits 14 stamped on the front (I assume meaning 2014). It is very likely now that there indeed was a bad batch. I would recommend for others having repeated issues to check theirs out and just replace again.

 

Just FYI to all, I decided to change my magnets a second time. I would get a P0012 code here and there once the oil would get dirty after about 3k-4k miles (Sometimes would get a P0022 as well). My mechanic advised me there is a second updated part number for these magnets so am hoping this will solve my issue. The newest part number is 272-156-00-00.

https://mbparts.mbusa.com/oem-parts/...sor-2721560000