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Does anyone happen to have the WIS or similar service bulletin to replace the hose in the picture below? Also the part number or official name to the plastic flange where the hose connects to the engine? This hose is on the rear of the motor and seems to attach to the firewall. The mechanic is insisting that the catalytic converters needed to be removed to service this hose and I just don’t buy it. Any help is appreciated. 2013 ML63
Last edited by Zerocarpileup; Sep 27, 2021 at 04:44 PM.
I believe I had the same shut off valve go bad. Had to remove the intercooler and all the plumbing in order to replace the part #2782000831 which is no longer used. In it's place part #2782002152 and #0025457883.
I know this is an old thread but with these cars being 10+ years old the plastic cooling fittings will be “timing out”.
I was able to change this hose on my E550 in about an hour without removing significant pieces of the car (cat/intake/vacuum pump). I only removed two vacuum lines that were in the way.
The hose is held in the common-for-today spring clip on each end. The firewall side clip is easy to get to and comes undone easily with a pick tool by pulling up in the center. The engine side is not so fun as it’s below and partially covered by the vacuum pump. In addition, on my car at least, the clip is upside down and would need to be pushed down, not up, with a pick tool. I elected to make a simple push tool out of some 3/16 rod to push down each end of the clip sine they were facing up towards me. The side under the vacuum pump is challenging but doable with a mirror and the tool I made. I should note there is only about 2” between the engine and the firewall so it wasn’t possible for me to get anything but a finger tip in the hose.
replacement took almost as long as removal and the hose is clocked. I did wrap a long screwdriver with tape to use as a push tool on the hose.
not the worst of jobs but tedious in that mirrors, flashlights, and trial and error bending the push rod. On a positive note the factory part from Pelican was only about $45 delivered.
I know this is an old thread but with these cars being 10+ years old the plastic cooling fittings will be “timing out”.
I was able to change this hose on my E550 in about an hour without removing significant pieces of the car (cat/intake/vacuum pump). I only removed two vacuum lines that were in the way.
The hose is held in the common-for-today spring clip on each end. The firewall side clip is easy to get to and comes undone easily with a pick tool by pulling up in the center. The engine side is not so fun as it’s below and partially covered by the vacuum pump. In addition, on my car at least, the clip is upside down and would need to be pushed down, not up, with a pick tool. I elected to make a simple push tool out of some 3/16 rod to push down each end of the clip sine they were facing up towards me. The side under the vacuum pump is challenging but doable with a mirror and the tool I made. I should note there is only about 2” between the engine and the firewall so it wasn’t possible for me to get anything but a finger tip in the hose.
replacement took almost as long as removal and the hose is clocked. I did wrap a long screwdriver with tape to use as a push tool on the hose.
not the worst of jobs but tedious in that mirrors, flashlights, and trial and error bending the push rod. On a positive note the factory part from Pelican was only about $45 delivered.
I know this is an old post, but I opened up annew thread regarding this repair because i’ve been stuck at this point for a while day and could not in the life of me think of something to pry that clip off. Your way of doing it hopefully helps me lol. My hands and fingers are all cut up because there’s NOOO space to do this job.
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