coins can get trapped in between the front of the tub and inner drum.you need to shine a torch between the rubber door gasket and the stainless inner drum gap.Not always easy to see if stuck in there though!!.Bra wires are also common.element out to remove them usually
CK
March 2013
If you are sure the coin is between the drums and not rattling in the filter the you can remove the heating element to get access. To check if between drums put a torch tight to the holes in the drum and move the drum forward and back it makes it quite visible to see between .Cheers
Kenjo
March 2013
I can answer this question...
Bosch exxcel 1400 washign machine rattle during spin like a coin inside?