The train ride to E will cost you some 10 minutes, security for the US departures can eat anything between 5 minutes and 30+ minutes when in coach. In Biz hardly ever more than 5 mins.
Add 10+ minutes for the walks, assume a bus connection coming in, adding another 10-15 minutes, boarding is 30-45 minutes out, and European flights are hardly ever on time .... there's no way I'd risk that.