SRS light on 2010 ml350 w164 diesel

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Got this airbag warning today, plugged in my Autel mk808 and the code attached came up. After about 10 mins the airbag and srs went off. Cleared the fault code and all back to normal. Is this something I should get investigated?

 

[xpack]

This fault has now become more persistant with the cold weather, it was 0 degs C this morning. Switched on ignition to start and Pass airbag off lamp was lit and wouldn't go off. If my wife sat in pass seat with seat belt off, there was no red warning light lit on dash. Scanner shows message as in pic. Car did not go into limp mode and drove normally. After an hour or so driving, I stopped the car and restarted, warning light went off and everything normal again probably till tomorrow morning if it's cold again. Has anyone came across this before and can throw a light on it and how to fix it.
PS:- A mate told me to fit an "Emulator" whatever that is and it would sort this. Can anyone help here, it's driving me nuts.