[Deplore]

Attached is the ECU connector pinout, but I don't have other connector pinout, unfortunately.

Battery voltage looks fine. Sure, it's low, but good enough. It is at 12.4 and below where it gets concerning.

Do resistance on the camshaft sensor plug to the ECU connector, make sure continuity is there and wire resistance is 5ohm or less on all 3 pins.

 

[tim687]

Deplore

You have vastly increased the possibility that I can take the CL600 with me on my vacation.

Thanks! Thanks! Thanks!

Since you are such an document wizard, is there an overview of all the ground points, together with the systems that they provide the ground connection for?
The ECU's main grounding point is W16/6, but I'm not sure which one that is.

 

[Deplore]

StarFinder

 

[tim687]

Wiring is good!

The newly replaced camshaft sensor is bad.

I am wondering if the precision if the old sensors have decreased, thus allowing any timing fluctuations to become unnoticed.

EDIT: Grounding post W16/6 had nothing connected to it on my MY.

 

[tim687]

Update; I didn't install the camshaft position sensor properly.

Please note the angle underneath the sensor with respect to the valve cover.

I've installed the sensor properly (which I did by pushing down and rotating the sensor back and forward), resetted the adaptations and oh boi she was running smooth.

Trip coming up tomorrow, I'll fill her up at Aral in Aachen, with 102 octane to see what she does on Autobahn 60.
I've removed the speed limiter, so this should be fun.

I did not replace the radiator just yet, as it hasn't arrived yet. The leaking did not occur anymore, but then again I only drove it 30km's last time. I've got plenty of coolant with me just in case

 

[tim687]

I removed the speed limiter and set it to the wrong value, the car is limited at 210km/h. Engine ran very smooth once it started to run great.

Today after the long drives it started to misfire at idle, which is strange cause under load it didn't misfire at all.

Oh yeah 102 octane, wonderful stuff, engine is happy.

If I keep the temps down the radiator doesn't leak that much

 

[Deplore]

I would replace the radiator though, how much a replacement 137 when it blows up?

 

[tim687]

6k brand new. I'll replace the radiator for sure, I just didn't get it on time. It has already arrived at home actually 😋

 

[Deplore]

6k for a brand new M137 engine? That's....cheap. Unless you're referring to used engine prices?

I know Mercedes charges about $20k or so for a bog standard M274 engine, and that's the normal boring ass 2.0L turbo 4 cylinder that you find in W205's.

 

[tim687]

Yup it is, there is an company I here in The Netherlands who has that engine in stock brand new.
Turbos are expensive, just like EGR vales and such and my engine doesn't have all of that 👌🏼

 

[tim687]

Alright, I've managed to do some on-vacation diagnostics as the car wasn't running properly. It only likes to run fine when the correction is set to enrich.

Even with this setting it does not like to idle and starts to misfire after 5 seconds, if I do not increase the rpms myself.

To be fair, the wire going to the left timing solenoid is the one that is absolutely soaked in oil. So that might cause the error code, although I've cleaned it multiple times. If this error remains, I'll take the solenoid out and start to clean it.

The engine doesn't seem to blue smoke upon startup anymore, that might be due to the Gotthard pass that I've taken 😋

These are the error codes I get.
I'm amazed by the camshaft position sensors as they are both brand new. Is it true that this car doesn't like non Mercedes sensors? @Kraut56 can you comment on this?

 

[tim687]

So it definitely feels like it's missing some power. When doing the radiator replacement I'll also do the leak down test. The tester only goes up to two bars however, is that enough?

How can I test the injectors myself, remove the fuel rails and leave everything connected when powering on the car?

 

[Deplore]

If you're just checking for leaking injectors, then that's a good test. Otherwise it's best to send it out to a company that refurbishes injectors.

 

[tim687]

Will try to do.

I've ordered Febi Bilstein camshaft sensors, they look exactly like the ones that are on the car from the factory and the measurements that where written on the product page matched the sensor exactly .

Don't buy the Delphi one, it doesn't fit properly.

 

[tim687]

So, I've installed the new proper Febi's and it starts up great!

However, that's all to be said. I think one cylinder is not firing properly cause there is a huge vibration throughout the rev-range.

I'm finally going to replace the radiator upcoming weekend so I'll let you know how that goes

Does anyone has a clue why it is misfiring at this point?

 

[Deplore]

Get the crystal ball out mate, these V12 are so temperamental it's not funny. You have first hand experience, so.... Could be spark, but those are new. Could be coils, but also new. Could be injectors, or a clogged cat, or what.

 

[tim687]

That is true, could you have a clue why I keep getting camshaft position sensor out of range error codes?

 

[Deplore]

Which bank? Also how many cam sensors installed?

I thought the M137 and M275 did not have variable valve timing, but apparently I was wrong. So the fact that it has a (2) camshaft adjusters means it needs multiple cam sensors to verify the cam advancing/retarding.

 

[tim687]

Which bank? Also how many cam sensors installed?

Bank 1. There is an total of two camshaft sensors and a crankshaft sensor. All replaced, with the camshaft sensors being the better fitting Febi Bilstein ones.
Crankshaft is oe Bosch.

At this point I'm wondering it I shouldn't just go with MB Genuine sensors

I thought the M137 and M275 did not have variable valve timing, but apparently I was wrong. So the fact that it has a (2) camshaft adjusters means it needs multiple cam sensors to verify the cam advancing/retarding.

Only the M137 has, the M275 used turbos to boost torque and power.

I do also have codes for the timing advance solenoid.

Note to self: When SDS says right bank, it is actually reffering to bank 1.

 

[tim687]

So I've ordered two camshaft position sensors from the same folks as who have the new engine. These are OEM sensors, they are old though, but the engine never ran so they shouldn't have worn out or anything.

I'm expecting them to arrive tomorrow.
I'll also replace the radiator tomorrow and if I have time, do a leakdown.
Otherwise I'll do the leakdown on saturday