2011 c200di oil cooler

[Brummie69]

Hi, I have changed the oil cooler but when I start the car after a few seconds the aux belt is coming off towards the front off the car.
My thinking is either the power steering pump or the air con compressor is not in line, I didn't notice any movement on the power steering pump but did notice minor possible movement on the compressor.
Am I on the right track or am I missing something ?
Any help would be appreciated

 

[mioba]

use your eyes and see if all pulleys are lined up. any play in pulleys - change them.

 

[Brummie69]

use your eyes and see if all pulleys are lined up. any play in pulleys - change them.

Sorted the issue, it turned out to be the belt routing, although I'm not happy with the belt tension, I think the tension is too much, it was a right pig to get the belt on. I've checked the belt (new) and it's the correct belt.