Stop car leave engine running error. I changed the modular . Still getting error

What is your question?

Stop car leave engine running. I changed the modular. It still keeps popping on and off. Got a new battery last week. So I'm sure that is not it.

What makes this problem better or worse?

Its pop on and off now

How long has your 2015 Mercedes-Benz C300 had this problem?

Months