The negotiations between the two sides resumed in Brussels on Monday with the UK's divorce bill top of the agenda.
Other matters due to be discussed before the latest round of discussions conclude on Thursday are the Irish border issue and citizens' rights.
But Henkel has waded in to the Brexit debate, saying European Parliament's negotiator, Guy Verhofstadt, and the EU's chief Brexit negotiator, Michel Barnier, want to punish Britain in the talks.
The deputy adds, "The reason is simple. They would seek to make sure that Brexit is such a catastrophe that no country dares to take the step of leaving the EU again."