If you need to accomplish maintenance for your CCM 450 DS then it is usually a good idea to own a Workshop Manual for a guide in the event you want to know tips on how to take off a certain component for instance the Wheel and install it again accurately.
CCM 450 DS Workshop Manuals offers clear targeted diagnostic guidelines with regards to your car therefore if something is playing up it helps you find out what the situation is and how you can correct it. You will be able to assess if this can be achieved on your own or if the job is too big you can actually make a reservation for your 450 DS in with a local mechanic.
CCM 450 DS manual