SLK320 Belt Tensioner Replacement

Firm said:

So replaced my serpentine belt a few months ago - pretty easy job. But my belt still makes a bit of a squeal for the first 30 seconds or so of run time in the mornings. I figure it's probably because my tensioner is getting weak?

Does anyone have instructions on how to replace this? I am trying to guage whether it's something I should attempt myself, or if I should just wait till my next service and let my indie do it.

Thanks,

Zack

Click to expand...

This is what my ALLDATA shows me.


1.1 Remove the fan shroud (3).
1.2 Remove electric fan (1)
2 Remove poly-V-belt (2)
3 Rotate tensioning pulley in anti-clockwise direction and lock
NOTE: Lock tensioning pulley with drift or pin (6, diameter 5 mm).

4 Unbolt shock absorber (7) at coolant pump
Shock Absorber Of Belt Tensioning Device To Coolant Pump Housing - 35 N.m

See "Special Tool" given below.

5 Unscrew bolts of tensioning device (5)
Self-tapping Bolt Of Belt Tensioner To Timing Case Cover
Thread Not Pretapped - 35 N.m
Thread Pretapped - 25 N.m
See "Special Tool" given below.

6 Remove tensioning device (4)
7 Unscrew shock absorber (7) at tensioning device (4)
Bolt Of Belt Tensioner To Timing Case Cover - 25 N.m

See "Special Tool" given below.

8 Install in the reverse order