Is it normal to smell coolant in cabin?

What is your question?

Its a 2013 BMW 550i 63000 miles, noticed steam or smoke coming from tailpipe gave it a little gas more came out then smelled coolant in cabin. Car was serviced then sat at dealership for couple months my husband got it at auction he's a wholesaler. There is no check engine light on. It does not happen all the time but at startup sometimes and goes away when warm up. Does the ac drain into the tailpipe?

What makes this problem better or worse?

Worse when engine is cold

How long has your 2013 BMW 550i had this problem?

Just got car for Valentines Day