Gear select problem
VAUXHALL Meriva Mk II (B) (S10)

I would appreciate some advice please, we have a meriva B which we have had since new it has 47000 miles on the clock and has been well looked after.

 It is becoming increasingly more difficult to select first and reverse gears, if you select third then go for first its ok, I am sure the clutch is ok (you can hear it disconnect the drive to the gearbox when depressed and the pedal feel is good).

is it possible to change the gearbox oil?  is there any adjustment to the gear linkage?

Thanks in advance.