We've just bought a second hand Bosch Classixx 1200 and have the same problem, our washing machine has that really strong drain smell (even the first load we did yesterday smells a bit funny). There is some grime around the seal but not a huge quantity. I was wondering if it has anything to with the fact that we had to transport the washer on its side (it wouldn't fit upright in the car). Quite a bit of drain water leaked out of the waste pipe and I'm thinking that maybe some of that water ended up in the machine too?
Can a washing machine be transported safely on its side?
I'm now trying a hot wash with detergent and soda crystals so we'll see what happens. Could it be that I need to clean out a filter or something?
Oh, I almost forgot - when I opened the drawer for the powder it had quite some (clean) water in the liquid dispenser compartment. Is there anything wrong with this? Maybe the water pressure is a bit too high?