CREATE TABLE table_1185 ("No." FLOAT, "Date" TEXT, "Tournament" TEXT, "Winning score" TEXT, "To par" TEXT, "Margin of victory" TEXT, "Runner ( s ) -up" TEXT)

What was the margin of victory at the Mercedes Championships?
SELECT "Margin of victory" FROM table_1185 WHERE "Tournament" = 'Mercedes Championships'
SELECT "Margin of victory" FROM "table_1185" WHERE "Tournament" = 'Mercedes Championships'