To partially bake pie shell: Do not prick pie shell. Line with foil and fill with dried beans or pie weights. Bake 5 minutes. Remove foil, bake 1 minute more.
In heavy saucepan, over low heat, melt chocolate and butter. In large bowl, combine sweetened condensed milk and warm chocolate mixture; mix well. Add eggs, water, vanilla, and salt. Mix well.
Pour into prepared crust. Top with the ½ cup of pecans and coconut. Bake 30 to 35 minutes until set.
Cool; chill 3 to 4 hours. Garnish with pecans and whipped cream.