I want to replace the door gasket because of the mold build-up.Are there special tools required and is it best to leave it to an authorized service tech.I am familiar with appliance repairs but not European products.What would be the way to tackle the mold problem?
Before you go to the expense of a new one mix a little chlorine in hot water & give the bellow a real good wash. Add a more chlorine in the soap tray then run a wash on 90c (without clothes of course). Repeating this say once a month should help. Mould is a by-product of eco friendly detergents & low wash temp, there are several off the shelf products that also help.
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Try fixfault.com to fix washing machines.