C 189 auto Locked in gear

Hi all

I have just changed the Diff on my C180 and now it appears to be locked in 3rd gear - Any ideas please?

Much appreciated for your help in advance

does it change up from 3rd?

does it have reverse neutral and park?

Does it have winter function? - which will start in 3rd gear to prevent wheelspinning.

Hi all

Its all sorted, i was given another diff and it had the wrong gear ratio and therefore locking into 3rd!

Thanks anyway