I have checked haynes.com but it seems like they only cover C230 - C350. Any other good sources to check? I have tried to contact Mercedes-Benz Europe directly via e-mail for a regular manual, but they haven't answered that now in 4 weeks, so a question on repair manual seems to be in vain.
Mercedes Benz repair manuals are very well kept by the company. Haynes or any other repair manual providers usually don't touch upon these vehicle. The reason is due to the complexity of the the vehicles systems.
Most issues have to be diagnosed using
Star Diagnostics(factory scan tool), and
Documentation for disassembly & reassembly procedures, technical bulletins, and, recalls, is found in their
WISsystem (log in required factory software).
Component locations and wiring diagrams are found on
Star Finderdatabase (log in required web-site)
Also, replacing any modules require the
Star Diagnostics computer in order to transfer the coding from the old component to the new one. Anything on the
Engine CAN communication system can only be ordered by a dealership and only after the owner of the vehicle provides proof of ownership (license, registration, and title) as well as a written signature.
Mercedes Benz puts a lot of work into developing their vehicles. They don't want anyone except trained mechanics working on them.