MPurvis

Hi, I'm new hear. I usually just scroll through the forum to find solutions to my problems but this time I couldn't find anything relevant.

I have a 2008 E63 W211 and it is currently undrivable. Around Christmas time I started the car up and let it warm up before I started a road trip.everything good to go. About 150 ft down the road as I got to my first stop sign, the car started shaking and the CEL came on. I knew I was misfiring so i decided it would be easier to just go ahead to the AutoZone a few blocks from my house to read the codes.

CODES; P0300, P0301, P0302, P0304, P0017, P0303.

I went ahead with the employees suggestions and ordered a new crankshaft position sensor, and spark plugs. a few days later I had replaced all the parts.
After starting it up again I still had the misfires so I figured maybe clearing the codes would help, so I chugged back over to Auto Zone and this time I was throwing even more codes.

CODES; P0300, P0301, P0302, P0304, P0017, P0303, P0305, P0040

At this point I just garaged the car and searched the forums for possible fixes. A good friend of mine suggested that it may be the ignition coils. with the car being at 85k miles he assumes they've never been replaced. I've also read about costly balance shaft repairs. Not that I know what that is because this is my first experience with a modern engine.

I'm just wondering if anyone has experienced this, or might know what I can do to fix it. Attached are the two print outs from Auto Zone.

TLDR; Car starts up fine, but is misfiring. Replaced Crankshaft Pos Sensor and spark plugs. 85k miles

alboogiee

Odd that all coils would go at the same time...unless they are pulling hard stored codes. I would suggest you get a MB code reader and look at stored codes not just CEL's. I had a coil let go then next week another went, at that point I replaced all 8...I had the misfire and cam out of position/phase codes not the sensor swap.

Forum mechanic suggestion would be to swap all the coils and then Italian tune up.

MACEDON

I have a feeling it might not be all coils at once but something that's in charge of distributing signal or power to the coils.

So whatever piece is before the coils might be the issue honestly.

At any rate there must be a way to test if the coils themselves are the issue...

alboogiee

By the print out coils 6, 7, 8 are good...if that's true swap them to 1, 2, 3. Clear all hard stored codes AND CELs then drive it for a bit and see what CEL's are thrown for what cylinders.

StarvingArtist

Check your fuel pump

sjc246

First off, never buy parts based on what Autozone or any other auto parts store tells you. They have no idea what they're talking about in almost all cases and even if they did, their job is to sell you parts: the more wrong parts they can sell you before you fix the problem, the better. It's not your coils. Contrary to what the auto parts stores may want you to think, coils are not a maintenance part: you don't need to replace them at a certain mileage. They can (and do) fail occasionally, but you will not have multiple coils failing at the same time (especially not 5 at once, that's simply not going to happen). Replacing random parts is not a good way to approach a problem like this (or just about any problem, really): you need to diagnose the problem. Checking for vacuum leaks and checking fuel pressure wouldn't be a bad idea given the misfires, but it looks like the real problem here is related to cam timing (which will, in turn, cause the misfires). You need to start by taking care of the P0017. Don't worry about balance shafts/idler gears: that's a 272/273 engine problem (the m156, which you have, has never been known to have any problems with the idler gear and there is no balance shaft--that's on the 272 v6 engines). Cam adjusters are a common problem on these engines but I would never just replace a cam adjuster without confirming it's the problem. You need help from someone who has the tools and knowledge to properly diagnose this (and that is not the highschool drop-out at autozone with a $30 code reader). Find a good indy with the real MB diagnostics tool ("SDS", "Star", "Xentry", etc) who can properly diagnose and repair the problem. If it does turn out to be a cam adjuster, that's not really a DIY job unless you really know what your doing (and you will NEED the factory tool to align the cam sensor rotor and an SDS to do the rotor adaptation procedure). If you can't find a good indy, the dealership may be your best option. It will be expensive, but there's a pretty good chance they will do it right (it's not even close to guaranteed, but you have a much better shot there than other places, and if something goes wrong, they will usually take care of it).

tw2

Yep, what he said.

StarvingArtist

That's all good advice. Don't know much about the 63 except that they have cam problems. Also, autozone parts don't necessarily work if that's where you ordered them. I go with FCP euro, Pelican parts, or the dealer.

MACEDON

So what was the problem