If you have 3G (code 360), you need to change the module to switch to 4G (code 362). Mercedes claims this is impossible, but this is not the whole truth for all models, as for the 213/238 both options were available at the start of production. In the event of a network failure, the 3G module will switch to 2G - the connection will be slower, not in real time, and you will not be able to renew your Mercedes ME "Remote Package" subscription. Other subscriptions can be renewed (but this will be slower).
There has been some speculation about a mandatory update for all cars and who would pay for it (in the EU this is mandatory roadworthiness from a certain date, or type approval for car models after a certain date), but the bureaucracy is slow and the outcome uncertain.
Some car owners have started replacing 3G modules with LTE, and this is possible if your car has the LTE option, some other models will require wiring changes. You need a person with access to VeDoc to change module information on the server side. After the update, the "Remote Services" subscription can be renewed (at least if the old subscription has not expired before the update).
VeDoc's policy varies by country: in some places official shops do this, in others they don't, and in others the importing company controls VeDoc and prohibits even third-party shops with an official Xentry subscription from doing so. It doesn't make any sense, but it is.
