hi im really running out of options here, well here is my story

i got a great r reg merc c180 eleganse, in great condition spotless inside and i thought i would be keeping this for a long while but...

one day i jumed in it to go shopping and it was in limp home mode, only reverse and drive 4

my brothers a top mechanic with taggarts so i though take it to him and get it fixed... that was about a year ago, the only thing that fixed it for a day was it was plugged into a computer and the automatic gearbox switch was reset, (apparently the one in the gearbox) does anyone know where this switch is as i was told it migt be faulty and even the mercedes mechanics who he is friendly with dont have a clue

????????

i really dont want to have to scrap this as it is in great cond just except for the limp home mode prblem, is there anyway to bypass his or im i just stuck with this now...

thanks guys