Highest salary at Mercedes Isd in year 2017 was $206,608. Number of employees at Mercedes Isd in year 2017 was 921. Average annual salary was $41,366 and median salary was $46,960. Mercedes Isd average salary is 12 percent lower than USA average and median salary is 8 percent higher than USA median salary. From 2016 to 2017, the average salary of employees at this employer increased 3.7 percent, the median salary increased 4.9 percent.