where is the aux belt idler

[mercman111]

where is the aux belt idler on a 350 w209

 

[Blobcat]

Front of the engine top left (as you’re standing facing it)

Assuming it’s an M272

Some pics on my thread below:

M272 Serpentine Belt Idler and Tensioner failure and replacement

Sat waiting for garage door to open tonight and thought “that’s a strange noise the door is making”. Then realised I could smell plastic burning... :( Engine off, bonnet open, front engine cover off and bits of belt strewn around :( Top idler wheel completely gone... You can see bits of...

forums.mercedesclub.org.uk

 

[rifiki]

If original change it, it failed on my car with no warning and shredded the belt which wrapped it's self round the crank shaft
between block and pulley causing more problems. M272 motor.