Do you have any knowledge regarding whether the lenses which are almost 18 years old must be adapted or brought into more current condition in order to be used?
Speaking generally and not specifically regarding the R lenses on the M 240, there should be no issues unless teh R lenses are damaged. I've used Hasselblad C lenses from the 60's with a digital back, Leica screwmount lenses from the 40's on the M8/M9, and Leica R and 30 year old Nikon AI-S lenses on the D800e and Canon 1ds3/5D2. No issues. No need to update, refurbish, modify, polish.