Mercedes-Benz Forum banner

2007 S550 W221 Motor Mount Replacement

21793 Views 24 Replies 9 Participants Last post by  Tubers
While sitting at idle this morning, my attention was drawn to a vibration coming through my driver seat. I checked my engine/motor mounts and, sure enough, my driver's side motor mount is shot. I mean, the motor looks like it's going to jump out of the car when I put my foot on the brake and give it a little gas. So, I have a new project on the list.

After doing a little research, it appears that there are 3 mounts that I should replace: 2 front and 1 rear (transmission) mount. Google searches turn up videos and info on w220 mount replacements, but I haven't found anything on the w221. Has anyone taken on this task? I could really use some pointers from someone who has changed theirs out, please.
1 - 3 of 25 Posts
Hello, having trouble with replacing the motor mounts on 2010 S550 4matic. The video below insists that you must remove the cv axles to get enough clearance for raising the engine to put the new mounts in. However, not seeing anyone mention that anywhere else. I’m having issues removing said axles and wanted to confirm if removing the cv axles is necessary for replacing engine mounts on 4matic s550. Link below if interested.

Thank you for the quick reply doni01. What is interesting is that the wis instructions that I came across after I got stuck (who needs directions?) doesn’t call for removing any axles. I will keep working at it and update if I learn anything interesting.
Oh Wow! That driver side cv shaft was a true pain. I was starting to wonder if I could get it to separate from the intermediate shaft. I have been soaking it in PB blaster for over a week but it wasn’t till I put some heat on it and gave a couple of stout hits with a long punch and a 3lb hammer that she finally separated. Was nervous about damaging the shaft bearing or the pan but I guess she needed some stern persuasion. The passenger side shaft came easy. With that shafts out of the way there should be plenary of room to swap the mounts where previously I don’t think there was enough room like the video said.
1 - 3 of 25 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.