The repair is straight forward but what can take long is the usual: 1) getting your hands in there, 2) dropping bolts, getting it in the right position to start the screws, etc.


Here's a drawing. It is the thing directly above the tensioner.

http://www.performanceproducts4benz.com/drawings.aspx?bmid=89


At FastLane it is under cooling system and is called a acc. belt tension damper.

glenmore
1991 300CE
2000 C280
1990 LS400