d6lc

Hi I have a 2008 GL450 with 50k miles, I got the P0012, P0015 and P0025 error codes very few months, so I ordered 4 new cam magnets, fitting the drivers side magnets was simple, and fitted the passenger inlet magnet. The problem was the passenger side exhaust magnet, which beat me as I couldn’t get to it, it seems crowded by the steering pump reservoir and moving that seemed almost impossible.

Anyone done this?, can give some advice on how to get to this passenger side exhaust cam magnet?

Many thanks

RCorney17

I've got the same question. Anyone else done this?

d6lc

I only fitted the 3, havent had any codes since, so I was lucky I guess

eric_in_sd

There's an extensive thread for the W203 (C-class):
P0012 - Camshaft Position - Timing Over-Retarded (Bank 1)

regarding replacement of the magnets. I didn't try to do the exhaust bank magnets, because I couldn't even get the torx bolts started (loosened). But it looks like the magnet can be replaced. It's wicked tight clearance, but the intake magnet on that side was pretty tight, too.

I hope you're doing the trick of the 1/4" closed end wrench.

When you say power steering reservoir - passenger side - are you in a right hand drive car?

d6lc

LHD car, let me know if you find an easy way to do it. At present it is not thorwing any code and the other 3 I replaced fixed my car's ill. However this one I am sure will go at some stage

eric_in_sd

am I hallucinating? The power steering reservoir is on the driver's side in a left hand drive car.

d6lc

I'll have to check as it was a while back, but I think you right. I think it is the drivers side, exhaust that i couldnt do. I'll check tonight

d6lc

Eric, your right it was the drivers side exhaust that I couldnt see an easy way to fit.

Have you done yours?

mercedes4ever

Friend of mine had the same thing, did what you have just done, 60,000kms later its still good! Just drive it!

eric_in_sd

I haven't changed the exhaust cam magnets yet. I'll wait until it throws an error.

Did you get the bolts out but then were unable to pull it? Or are you just looking at it and figuring there is no way to get it out?

d6lc

I couldnt get the bolts out as teh PS reservior was in the way, and couldnt get that off.

RCorney17

I can get to two of the bolts for the P/S res but in order to get to the third, it looks to me like you need to remove the upper radiator hose. I tried pushing it aside but ended up busting the two very brittle clips mounting it. Arrgh!

I then tried to remove the hose and since it was dead cold I thought fluid had run back into tank: nope. spilled probably a 1/4 cup down the serp belts and pulleys! (This simple DIY is going from simple, to bad, to awful for this one cam magnet.

I'm back to searching the exact location for the ONE that is giving me faults. P0025 I thought was drivers side.

d6lc

So after getting the rad hose off, did you manage to get the PS reservoir off?, I ask as I now have a leak from the PS reservoir so now I have to find a way to get it off!!

RCorney17

Nope, I put it all back together. Im going to try the 1/4" wrench method mentioned here and on other posts next.

Sorry to hear your P/S res is leaking.

d6lc

I managed to remove mine yesterday after a few hrs of fiddling around. you need a T30 torx about 3-4 inches long and a 1/4 inch wrench to remove the lh torx (when looking at the car). I found a mirror really helpful to be able to see what is bolted where.

You also have to remove the C clip holding the reservoir to the pump, you will only see this using a mirror, its at the bottom RHS of the reservoir, behind the return hose.
I syringed all the fluid out first, but when you pull off the tank you still get oil everywhere.
My O’ring had flattened compared to the new $3 one from the dealer, one tip for refitting is place the C clip on the tank first so that it is in position, otherwise it is impossible to get your hands down and fit. Once bolted on you can lever the C lip in place with a screwdriver.

After doing it once, I recon I could do it now in about 1 hrs, it is super tight, and by the look of it no tricks.
Good luck

eric_in_sd

When you say "no tricks" do you mean you think it could be removed without removing the power steering reservoir?

Thanks for the followup. I don't understand why more GL owners aren't facing this.

d6lc

I dont think you can remove the cam magnet without taking the reservior off, the no tricks refers to removing the reservior, it is just fiddly with very little space. You need a long torx bit and a 1/4 inch wrench on it, there isnt room for a socket

bhuter24

Hello Everyone,
I got the P0025 code and ordered the magnet from Amazon. I removed the radiator top plate and then moved the radiator hose to the side and unscrew the 3 screws. After unscrewing the reservoir screws I was still unable to see or feel why I was not able to move the reservoir to side. But anyways I remembered that I read somewhere that it should give me enough room to get the job done. I unscrew the 3 bolts holding the magnet. I able to get the bolts out. Now when I tried to get the magnet remove, it was touching the reservoir I barely put any pressure on the reservoir but it broke off at the bottom where it was attached to power steering pump. All the fluid came out but now I had all the room the replace the magnet .
Anyways I am attaching the pictures where it will show the broken part. But anyways I need to know if I should purchase some special power steering fluid or can I use the one which I can get from AutoZone?

eric_in_sd

Ooh bummer
I think it's just garden variety ATF. Check your manual, though.

TX07GL450

Power steering Fluid is Pentazosin

https://www.fcpeuro.com/products/hyd...chf11s-1-liter

eric_in_sd

Here is what it says in my 07 manual:
MB Power Steering Fluid or approved Dexron III ATF

You can use the goor-may stuff if you want, but this is a frickin hydraulic pump. It just ain't that finicky.