What did he do this time?
"Gar nichts war das! Was bist Du denn für ein Spinner?", hatte Schmidt nach einer strittigen Szene kurz nach der Halbzeitpause in Richtung Nagelsmann gerufen: "Halt doch einfach mal die Schnauze!"
I'd roughly translate that to: "That was nothing! What kind of lunatic are you? Why don't you shut your gob!?" he said that towards Nagelsmann and the Sky mics picked it up.
I think he also said something which amounts to "kiss my ass" and "you think you invented football, dont you?" - that stuff is not quoted on the news sites, but it's audible in Sky's highlights. I think the second one is particularly amusing, since aside from Zorniger, Schmidt is precisely the one German coach I would've attributed that kind of mindset to.
and in the post match he commented the situation with
"Ich habe dem vierten Offiziellen die Chance gegeben, mich auf die Tribüne zu verweisen. Anscheinend ist das so, dass man das so nicht sagen darf, das muss man akzeptieren"
which I would translate as: "I gave the fourth official the chance to send me to the stands, apparently it's the case that you aren't allowed to say such things and one has to accept that".
Völler was also quick to step in and said:
"Mir tat der Schiedsrichter fast ein bisschen leid, weil er es eigentlich nicht machen wollte. Aber es haben zu viele Leute gehört, vor allem ihr von Sky. Dann ist es für ihn schwierig, ein Auge zuzudrücken."
which roughly translates to: "I almost felt a but sorry for the referee, because he didn't really want to do it [send off Schmidt], but too many people heard it, you guys from Sky in particular and therefore it's hard for him to turn a blind eye to it."
Schmidt still has his two match probation from the Dortmund incident hanging over his head and given that he's a serial offender he might miss like 3-5 matches, apparently there is no precedent, so the DFB judges can really go to town on him.