MBWorld.org Forums - Command issues

Good evening all, I have a c220d coupe, 4matic 2018 and recently the traffic sign cam started to not work now and again, now it won't work at all, I've recently had it serviced and the tech says it's the hard drive in the command unit. This has also been playing up recently also, it crashed a few times and does weird thing when connected to phone such as not allowing me to answer a call, saying the reverse cam is not working when it is etc.
Has anyone encountered this issue before? It's about 3k for new hard drive but I think it should be able to be repaired by a specialist????
Thanks in advance!