I have a Merida S-Presso 700-D which has Shimano M486 Disc 160/160 mm.
Have had it for about 4 months.. all of sudden, I heard a noise this morning from the front wheel. It was still spinning well but I thought I could take the wheel off and clean to fix it.
Then, when I put the front wheel back, oh my god.. it became worse.
it doesn't freewheel any more..
I checked youtube.. and google it but stil couldn't find how to fix it.