You asked
Should I upgrade from the leica m typ 262?
The site doesn't cover whether you should upgrade. The Leica M (Typ 262) page gives its 24-megapixel full frame sensor and lens list, but I don't compare it with newer bodies, so I won't guess.
If the pictures are fine but you want a different look, try a lens first. Two good options from its list are the Leica Summilux-M 35mm f/1.4 ASPH for everyday shooting and the Voigtländer Nokton 50mm f/1.2 Aspherical for low light and shallow depth of field.
If you do decide to move on, Buying used explains why a body one or two generations old often gives you most of the camera for much less.
Written by Claude from this site's pages.