I would just drive it for awhile first. It will do no damage I can think of.

Did a caliper change not long ago and bled the brakes. The pedal remained lower than I like. Certainly far lower than before I changed the caliper out. It still had good brakes.

Not a Mercedes and the brother in law told me to drive it and the pedal will come back. Truthfully I had my doubts . Especially when he said it might take weeks sometimes.

Well about three weeks of daily driving and the pedal was back up. Where the air was trapped and how it got out is beyond my understanding. Even if it was air. Yet it pretty well had to be but the pedal was not really soft. Just low. It is hard to be certain but the pedal returned suddenly I thought over a gradual improvement. With no detectable change in braking quality.

He works on cars continuously. All brands so I respect his opinions. I did go look up the cars brake issues on the web and this model has presented many problems of what are odd issues to me with their brake system. For far too many people. Many got no pedal and had to have the car flat bedded to a dealer. I had exactly that at first with the initial bleeds.

The possibility exists some air got into your hard injector lines and may take some time to clear. In your situation.