PeachParts Mercedes-Benz Forum - View Single Post

Fourings · #4 06-16-2006, 09:03 PM

I just had to do this, so I'll try to replay if memory serves.
I probably did more than I needed to, but I pulled the fan, fan pulley, tensioner pulley, and power steering pulley. Then I loosened the power steering pump and slid it out of the way. That may not be necessary, you might try getting the tensioner off without moving the power steering pump first and see if that works. You will need to remove the stamped steel bracket that attaches to the front of the tensioner, belt idler, power steering pump, and another part that escapes memory right now. You will also need to remove the big bolt (19mm) that runs through the center of the tensioner.
I've probably done a fair job of making this sound pretty awful, but it really isn't that bad. Once you get the fan out of the way, the rest is pretty easy, just takes a little time.
Make sure you make notes on how the serpentine belt runs around the pulleys before you pull it off. Same with the various bolts that you will pull off.
Once you get the tensioner off you will see pretty easily how the adjuster goes on. Those break all the time, so getting a replacement shouldn't be tough.
You should check the tensioner once you have it off. Put the round part that the adjuster fits onto, the round part with the two flats on it, in a vise and move the tensioner in the direction it would go in when it's installed. If it doesn't spring back to the default position, it's bad and should be replaced.
When reassembling make sure the little plastic pointer is at the furthest mark to the right. The pointer can fall off when you have everything apart, so it's a good idea to get it back to the correct "0" position before going back together.
I think that's most of it.
Oh yeah, you'll need a special tool to remove the fan. Got any friends who are Benz techs? Perhaps you can get one through the tool service on this site.