johnand

Did you reset/clear the codes AFTER replacement?

kokinos

Actually when I replaced the code wasn't on. About 10 miles after I replaced them the check engine light went on and then I have erased since a few times and it still comes on every time.

mskembo

I drove back to my house last night to pick up my parts, and am planning on doing this tonight in front of my hotel , one question I have is do I need to do the reset in STAR, or will it work when I just replace the magnets and clear the codes?

johnand

Good luck Mike! Just replace the magnets, then clear the codes with an OBD2 scanner. No STAR required!

mskembo

SWEET! That's good news. Thanks John.

mskembo

I really thought I had read this thread carefully and understood what was needed, so I was pretty confident taking this on last night. Unfortunatly, it didn't go quite as planned, so I thought i'd give a list of tools that should be on hand if you are about to try and tackle this project.

1. E8 (external torx socket)
2. T30 socket, screwdriver, in as many variations as humanly possible
3. 6mm 12point wrench
4. Various extentions
5. Tool pickup magnet
6. Magnetic tray to hold screws and bolts

I started this project out with just a socket set that does E-Torx, a screwdiver, and a couple of misc tools. I was able to do the passenger side pretty easily, but still haven't been able to get the driver's side done. I also had the distinct pleasure of making three trips to Lowes, luckily there is one right next to my hotel. Maybe I can tackle that tonight. The problem is getting the power steering reservoir out of the way. So far it's really eaten my lunch.

johnand

Mike,

I haven't had the pleasure of replacing the one's on the driver's side, YET The one's on the passenger side are a cake walk, the one's on the driver's side though, look to be a little tough. Indigo_kid gave us all the secret to dealing with the one's on the driver's side w/o taking everything apart. Hope the other's go well for you. Again, good luck.

pcy

mskembo, YOU DON'T NEED TO REMOVE the PS fluid reservoir to replace the camshaft adjuster magnets. Just use 1/4" size 12-point closed-end wrench. I have done this. Much simpler go this route than having to remove the PS reservoir and all that...

Mercedeschick

Thank you so much for all this great info! I was just about to order the camshaft sensor until I read this thread. So now I'm going to change all 4 magnets with the updated part. Will update with my outcome.

BlkBenz8

I currently have the P0022 bank 2, after reading throughly my first move is to replace the magnets THEN clear the error codes. Hopefully this will resolve my problems, as which sometimes they can be very noticeable.

Problems go as following; Traveling at regular speed 60-75mph then error code pops up, car goes into limp mode not responding to my throttle and very deep tone in exhaust. After turning car off anf then back on the car shakes a bit but then fixes itself.

I havent ran my car hard for the past week, so the code hasnt poped up. Will order the magnets and let you guys know.

MB:Specialist

for all of you guys getting the "retard" code, your cars or going to need balance shafts, its about a 4000 dollar job. The metal is wearing off the sprocket and causing the camshafts to retard timing to stay running smoothly.

Glyn M Ruck

This is not an accurate statement!

johnand

Glyn is absolutely right, this is NOT an accurate statement. See the PDF in this thread here: https://mbworld.org/forums/c-class-w...ault-code.html

All P0012's codes referenced in this thread ARE 100% magnet/solenoid related, and NOT balance shaft.

agp84

im getting code p0025 , could you tell me which magnet is the one i need to replace and what is the part number

carbonfiberwhor

And this is the exact problem my car has been having lately.

Good to know.

Can you tell me which posts to review for advice and directions on how to replace the magnets?

carbonfiberwhor

Also, are there any pics of where the magnets are located in the engine(all 4 please)

agp84

could someone point with magnet i need to replace for code p0025

johnand

P0025 is Bank 2 Position B. Bank 1 is passenger side, Bank 2 is drivers side, A position is Intake Cam, and B is Exhaust Cam. So, yours is Drivers side exhaust cam, so #1 in your drawing.

Since these are known to be a problem and are cheap and easy to replace, I again STRONGLY recommend anyone with magnet issues on the M272, to just replace them all, to eliminate issues with the others later down the road.

pcy

^ +1.

M272 engines are notorious for this issue. It's a matter of the time before the error comes up. Those magnets have been updated and the new version magnets don't seem to have the problem [with the original magnets].

I had this issue and I replaced the magnets about 10 months ago and no problems since then.

carbonfiberwhor

could you provide a photo of where they are located and what they look like.

pcy

they are highlighted in post #117 (scroll up).

If that's not clear, here's another photo...

agp84

thank you for the location of the sensor !!!!

carbonfiberwhor

Out of sheer curiosity, why dont we just clean them up and put them back in? Like clean it with crc and put them back in.

A mechanic friend of mine thinks it would resolve the problem without replacing them

pcy

If those magnets are expensive, that's what I would've tried first. Since those magnets are [relatively] inexpensive, I'd rather replace them and move on with life.

johnand

+1. Also MB superseded that part because they were causing problems. Why bother with the hassle for a $20 part?