timing belt

I need to replace the timing belt on my 318 touring with the M40 engine. I did one years ago with the help of a mechanic who used a beam type torque wrench to tension the belt at the tensioning pulley. Does anyone know how much torque to apply? Thanks

Hi all May be a stupid question, Has 5 series 330d 2006 got a timing or cam belt as I recently bought one and miliage is high so wasent sure if it has got one? Thanks in advance.

The car has only done about 70K miles but I was too late in changing the timing belt. It broke, or at least that's what the AA man said has happened. I've managed to remove the upper timing belt cover but simply can't fathom how to remove the lower half. Here's a photo of the front of the car...