Again… ;-)…: Which diagnostic scanner, which SW?

Moinsen, there are already some threads on the topic – nevertheless I start one more time. Will me actually for weeks (for the current occasion – with my W203 CL lights up the engine control light, evaluation with Torque reports an error at the Lambdasonde before Kat) buy a diagnostic scanner or a SW, however does not come to Potte, because the descriptions of the manufacturers are partly very poor and I do not really deal with the topic so far I’m just a hobby screwdriver and I’m sure I won’t learn SGs or anything. But who knows, I’m just starting to deal with the subject, so I’m already itching to buy a reasonably affordable device that can do as much as possible. Even though I may not be able to use it to the full at first. And knowing that the egg-legging woolen milk sow just doesn’t exist for lukewarm. Maybe you can help me a little bit anyway. Application primarily for my Mercedes S203 and W203 CL, but always like to buy “waste metal” from other manufacturers, so the device should be either multi-brand or (possibly) purchase options. Currently I have in my sights: SW: – Quantex scandoc (single brand, expandable, per brand 50,–) – Quantex scandoc compact (single brand incl. 1 brand, expandable, every additional 50,–) devices: – AUTEL MOT Pro EU908 (multi brand) – Carsoft MI6 / MERCEDES & SPRINTER (single brand, ohn) e Extension possibility). Especially for the Carsoft products I could not find anything here in the forum. Thank you in any case for your inputs. Greetings, Andreas