The Do 17L-0 and Do 17M-0 were developed in parallel as replacements for the earlier E and Fs, the L being the reconnaissance version.
Verzie Do 17 L-0 a Do 17 M-0 boli vyvinuté paralelne, ako náhrada za staršie Do 17 E a F, pričom verzia L bola prieskumnou modifikáciou.