Engine belt: Difference between revisions

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== Replacing belt ==
== Replacing belt ==
The tension can be released using 17mm socket and pushing the bar down (see photo below).
 
To remove tension from idler pulley, locate 17mm tensioner bolt located on tensioner bracket (see photo below). Belt obstructs the view so it has to be found by feel.
After locating 17mm bolt, push down the bar (see photo below).


[[File:W220_S500_removing_serpentine_belt.jpg|300px]]
[[File:W220_S500_removing_serpentine_belt.jpg|300px]]
[[File:W220_belt_tensioner_bolt.jpg]]


See photo DIY here (S350/S430/S500):  
See photo DIY here (S350/S430/S500):  
http://www.benzworld.org/forums/w220-s-class/1582489-drive-belt-idler-change-photo-diy.html
http://www.benzworld.org/forums/w220-s-class/1582489-drive-belt-idler-change-photo-diy.html

Revision as of 21:07, 23 July 2019

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Description

The Poly-V-belt drive (commonly known as the Serpentine Belt) drives engine components (alternator, AC compressor, etc.) from the engine.

Layout Diagrams

S350/S430/S500

  1. Automatic belt tensioner
  2. ABC tandem pump (pump for power-steering assistance and ABC chassis)
  3. Air conditioning compressor
  4. Crankshaft
  5. Coolant pump
  6. Generator (alternator)
  7. Idler pulley

Length: 2380mm

S55 AMG

The S 55 AMG has two poly-V-belts (belt one shown in purple/belt two shown in black).
  1. Idler pulley
  2. Automatic belt tensioner
  3. ABC tandem pump (pump for power-steering assistance and ABC chassis)
  4. Air conditioning compressor
  5. Crankshaft
  6. Coolant pump
  7. Generator (alternator)
  8. Idler pulley
  9. Automatic belt tensioner
  10. Supercharger

Length of belt one: 1289 mm

Length of belt two: 2462 mm

S600

  1. Automatic belt tensioner
  2. ABC tandem pump (pump for power-steering assistance and ABC chassis)
  3. Air conditioning compressor
  4. Crankshaft
  5. Coolant pump
  6. Generator (alternator)
  7. Idler pulley
  8. Idler pulley
  9. Idler pulley

Length: 2335 mm

Replacing belt

To remove tension from idler pulley, locate 17mm tensioner bolt located on tensioner bracket (see photo below). Belt obstructs the view so it has to be found by feel. After locating 17mm bolt, push down the bar (see photo below).

See photo DIY here (S350/S430/S500): http://www.benzworld.org/forums/w220-s-class/1582489-drive-belt-idler-change-photo-diy.html

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