Test of the ability of our linelist to reproduce the reference [Fe/H] for the Gaia benchmark stars. The y-axis shows the difference between the reference value and the value we derive (using the reference T_eff and log g, but our own linelist and SME). We derived [Fe/H] in three ways: using both Fe i and Fe ii lines (blue filled squares), using only Fe i lines (red filled circles), and using only Fe ii lines (black filled triangles). The stars can be identified using the T_eff values which are given on the x-axis. For some of the stars we have more than one spectrum. Results for both are shown in the plot.