Which Aux Belt Tensioner do i Have?

According to my Haynes manual there are 3 types of tension pulley. One is self adjusting and the others are not. Can anyone advise me on which I have? The belt sequels under load ie heater and lights on but noise stops when lights and heater turned off.



I have a 2003 1.4 Megane II. I am hoping I dont have the self adjusting pulley as I have been quoted in the region of £40 for the part. I am just hoping I can tighten it up without the cost.



Thanks for any advice.