Metallicity distribution functions from PDR1-giants in six galactocentric distance bins and their corresponding GMMs (solid lines) and the three individual GMM components (dashed lines). The GMMs are shown next to each other in Figure 15. All distances are given in kpc. The individual GMM components are labelled as 1, 2 and 3 with decreasing metallicity in the top panel. The region [Fe/H] > -0.5 dex is greyed out for the most distant bin as we are not properly probing this region of the MDF, see Figure 13.