Some help please. Astra G 2003 Z17DTL. I want to know if the service book is for real, o

Hello. My name is Volintiru Dragos i am the owner of Opel Astra G, z16dtl, manufactured: 03/2003. I am from Romania, and I bought this car from your country.

CAR VIN:W0L0TGF0835164010

1.7cdti-Z17DTL-00662168 .

I'm asking you if you can help me with all the datas of this car from 0km to present, or some answers for some important parts:

In my service book it's written that the spannrolle and zahnriemen were changed on 14.10.2010 at 151.994 km at BENSCH Auto Service.(can i verify that's for real?)

I want to know for sure if those parts were changed because it's very important, i don't want to break the engine.

In present the millage on the dashboard: 243000 km.

Please help me with some answers about this car, ...