Hello i have a c270 cdi 2002 i just got it and i notice that when i change from park to reverse / park to drive / drive to reverse there is just a slight kick and the car tries to move and after that all is completely normal all gears change fine just that slight kick is it normal ?

What's your mileage?

Check your flex discs. There are 2 in total. One of the symptoms of a bad disc(s) is a clunk when shifting into gear as the disc gets loaded.