We present preliminary results of deep echelle spectrophotometry of a sample of HII regions along the disk of the Scd galaxy NGC 300 obtained with the Ultraviolet and Visual Echelle Spectrograph (UVES) at the Very Large Telescope (VLT) with the aim of detect and measure very faint oii\ and χ permitted lines. We focus this study on the C and O abundances obtained from faint optical recombination lines (ORLs) instead of the most commonly used collisionally excited lines (CELs). We have derived the ionic abundances of C^{2+} from the χ 4267Å RL and O^{2+} from the multiplet 1 of oii\ around 4649Å in several objects. Finally, we have computed the radial gradients of C/H, O/H and C/O ratios in NGC 300 from RLs, which has allowed the comparison with similar data obtained by our group in other nearby spiral galaxies.