The MHD wireless adapter allows you to reliably use all MHD features on the go, faster and easier than ever before. Just plug it in to the OBDII port, pair your mobile device to the Wifi access point created by the adapter, and you can flash, log, read codes etc. instantly – no cable needed anymore.

Does MHD remove check engine light?

Also I have MHD, does either of the stages remove the check engine light and let everything be ready? No, MHD will remove the code but not show them as ready.

Who can read BMW codes?

Like Quick showed via diagram, there are two kinds of codes. Basic OBD II that a scanner can read, and proprietary BMW codes that only a dealer (or a well-equipped indie) can read.