Confusion when specifying timing belt change V50 1.6 Petrol

Hello, I have read here in the forum, in maintenance plans of Volvo and Ford various information about the interval of the timing belt change and am now somewhat irritated, because I would like to risk a damage here. Vehicle: V50 1.6 gasoline Zetec-SE Ford Alu engine. 123.000 KM BJ 07 / 2005 Regular maintenance, but first timing belt. During the last maintenance in April 2013 at 107.500 KM I was not pointed out about an upcoming change. The car was already almost exactly 8 years old information that can be found about this: Change at – 120tkm or after 8 years ( you find more often in the net or here in the forum ) – 140tkm or after 7 years or mx 10 years ( maintenance plan ) – 160tkm or after 10 years ( maintenance interval at Ford Focus ) Since I have now 123,000 on it and in the 8.5 year I am somewhat unsure!? I actually wanted to make it during the inspection next spring. If the installed tooth belt is critical or susceptible to it ? After maintenance plan I am not even still a bit of time. But I still have a bit of time.