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Edit: figured it out- it’s called a drive accessory belt. Part 611-234-01-93
Greetings,
I am trying to figure this particular pulley that I think is positioned near the power steering, but doesn’t appear to be power steering on this 2008 s550 4matic. The serpentine belt unfortunately snapped and damaged some idler pulleys so I am trying to replace them.
The one in question is the picture below.
I looked at some diagrams that say it’s the power steering location, but it clearly looks like a regular pulley. So I’m a bit confused on what I should look for on replacing: is this just a regular pulley or the power steering? Also a part number would help if I can just replace that pulley. Thanks!
Last edited by rom_s550; Sep 23, 2023 at 05:52 PM.
Reason: Found answer
I'd order something like the Continental ADK0012P kit which includes the belt, the tensioner and two pulleys. I don't think the belt failing caused the pulley to fail - the opposite. Replace everything.
Yeah I did the whole belt/pulley kit chasing an accessory noise before learning it was the A/C pulley. Not that difficult but sourcing the correct diameter pulley is difficult. The one I ended up with was an eBay special and had a slightly larger diameter (so compressor spins slower). Haven't noticed any ill effects though. These cars have quite large A/C systems so there is probably capacity to spare (which would really only impact idle conditions).
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