Removing the oil filter housing isn’t too difficult. It’s hard to see and you may have to remove the fan, but it is certainly doable. You will have the remove the air inlet pipe and thermostat. My thermostat broke on removal. Keep in mind that there are 7 bolts for the filter housing. 5 are the same and the two on the far right (when looking in the engine bay from the front) are different in thread and length. I would get a new gasket for the housing and new o-rings for the lines. I just did this job and snapped a coolant line. Kind of glad I did as it was better to proactively replace them rather than wait until the break.

Tedious job and I replaced the water pump and belt tensioners while I was in there. Just did the coolant feed line on the back of the left cylinder head and that was a challenging job given the lack of room and visibility.

 

Do you mean that the tensioner will not come out? or do you mean that the turbo coolant hose nipple will not come out of the center of the block?

scroll down in this thread for instructions. Post 2 has what I needed to get all the way to the cam covers/end caps. (thanks kennyed)

https://mbworld.org/forums/w212-amg/...ck-valves.html

Edited to say crap, were you just trying to remove the belt?

If you wind up removing the thermostat, there is an updated part, so be very careful, don't remove it if you don't have to. The updated part requires a new water pump (this only may be because I have a '13) YMMV. The plastic is brittle and fancy.

 

I think it's the thermostat. Code7rpd, so you broke it when got it removed? It's kind block access to the oil filter housing screws.

 

yes it broke. don't wiggle it, use something to help move it strait out (like a thin blade moving around the circumference slowly, I was able to find the part. try to look up the part number first. Post five of the check valve thread

 

 

glad to hear you were able to fix it. I looked at and watched a few videos and decided to call a local shop 😂

I was scared I’d drop a bolt from the vacuum pump into the abyss

 

I hear you on that! I pulled the exhaust thinking I could access the bolts from the bottom but no luck. It’s really tight access. I also replaced the oil breather cover as it was seeping a little. Waiting on a few coolant lines now - decided to replace every coolant hose I can access and also put in a CSF front heat exchanger along with PLM side exchangers. Doesn’t seem like they will make much of a difference, but since everything was apart, I figured I may as well. Replaced the radiator as well - could have left it but since it had to come out anyway I decided to replace it. Hopefully, after all this and new plugs along with coils, I should be good to go on maintenance for a while. Just hit 108k and hopefully no issues will present themselves for a while.

 

Yes, when I pulled it apart, a few plastic pieces that surround the thermostat broke. The heat really does a number on the plastic pieces. I just pulled the rear coolant feed line valve and it came apart. It was just a matter of time before it let loose. It was a pain to get to, but I’m glad I got it done.

The plastic just deteriorated and it cracked on removal.

Here is what it looked like:

 

Where did you end up getting the work done? Trying to keep a place in reserve for when I need it.

 

It gets stuck in there, I can't pull it out. Will try some silicon spay to lubricate see if that will help. Thanks.

 

Got the thermostat out in 1 piece :-) Anyone has part number for the oil line O-ring? My search return the whole part, not just the O-ring. Thank you guys.

 

Nice job! The o-ring part number should be 278-201-02-80.

 

I think I can't locate screw #22 & #26. My oil filter housing is a bit different than the one in the picture.

 

Sound dump but do I need to remove this:

 

No

As far as the bolts, either put a phone down there and take a pic or go online and look at the part. I used a phone on video and going in a circle around it. I think I mentioned this issue, that wis was slightly off, as are the videos

 

i used m1 Mercedes only in Fremont but I’d go to Mercedes only in Hayward if possible. I think a number of guy from nor cal amg go to him.

if you’re in the area I can send you his contact info.

 

Thanks!

 

Here is a different diagram

 

Attaching the different diagram:

 

What are these 2 black lines? There is a screw behind these but I can't move these away, they are not flex and I don't want to break them.

 

Perhaps turbo coolant lines. See attached and let me know if you need something else.

Regards,

Joe

 

Those are the infamous turbo coolant lines. Be careful moving them. Depending on your mileage, they may be brittle. You will have to loosen the clamps to give you enough room to maneuver the oil filter housing out. Not sure if you will need to disconnect the bolt that holds it into the water pump. You may have enough wiggle room the slide the filter housing out.

 

I got 5 screws removed and still searching for a couple more. The oil filter housing is still hard rock solid. It's become a nightmare!

 

Here is a picture of one removed. I marked the bolts with gold paint.

 

Thank you so much, the real picture of the part is very very helpful!!!!!