Well guys i have the subject wagon. I am not getting my 5th gear at all. Maybe this model came with this problem. I have driven four gear tranmission in my previous Merc, never had any problem in that.

My Mechanic had checked all the electronic circuts but could not trace the fault. I am now moving in 4 years. Otherwise the gear shifting from 1st to 4 th is ok. Now there is no Od (5th gear)

I have changed the tranny oil with the new filter but there is no improvement in getting the 5th gear on.

Anyone can tell what could be the problem