Breather hose replacement:
This is far from the best video on this topic, but I am faithfully posting every video 'MercedesSource' puts on YOUTUBE in his M112/M113 engine series. Replacing these hoses is a job I did personally along with resealing the breather covers. I took pictures trying to document the process online in this forum. There are 3 or 4 posts that begin with this one... https://www.crossfireforum.org/forum...tml#post969044
So, would I do ANYTHING differently were I ever to do the job again? Yeah I would but I welcome any feedback on this. I used all genuine Mercedes-Benz parts which are made of actual rubber. There's at least one manufacturer who makes the hoses out of I think, viton; but I could be wrong about the material. In any case not only are those hoses much cheaper than the Mercedes' parts, but they claim that the man-made material lasts much longer in service than natural rubber, and that's why I would give them a try. He is correct that the most difficult hose to replace is the one that attaches to the left (driver) side of the lower plastic intake duct on the rear of the engine, but still, you never have to remove the lower plastic intake duct (what he calls the elbow). You do have to remove the mass airflow (MAF) sensor though to get to that wonky piece he shows at 1:43 of this video, along with replacing the rubber seal between the MAF & the lower plastic intake piece. You can see him removing the MAF at 5:41 in this video. BTW, you won't be able to just lift it off easily like you see him doing if no one has removed it for 15+ years. You're gonna have to use significant force! That's why he recommends using silicone grease when you reassemble everything.