I used this set of instructions to replace the water pump on my 1993 300E last weekend. Wanted to add one comment/correction for any future users.

Step 8 says to remove the four hex bolts on the front of the power steering pump, below the reservoir. Don't do it! These hold the nose of the pump to the body of the pump, when you remove them the nose comes off and all your power steering fluid dumps onto the floor of the garage! Don't ask how I know this.

On my car, the PS pump is mounted via four bolts. Two of these are shared with the tensioner, and two are unique to the PS pump. After removing the tensioner assembly, remove the two PS bolts *from behind the PS pump*. The pump may then be moved to the right for better access to the water pump.

Other than that one minor quibble, everything was spot on. Took me about 4 hours of labor to do the whole job. Not a bad way to save six hundred bucks.

- JimY