Darmstadt picked up a point on their return to the Bundesliga after an absence of 33 years, drawing 2-2 with Hannover at the Bollenfalltor.Goal-line technology made its Bundesliga debut to rule a Salif Sane effort out, but it was Darmstadt who took the lead with their first top-flight goal since May 1982. It was well worth the wait when it arrived with Marcel Heller racing almost the full length of the field before turning in onto his favoured right foot and curling a shot in off the underside of the crossbar.Charlison Benschop levelled for Hannover early in the second half, but Heller was having none of it, rounding Ron-Robert Zieler and slotting the ball in for his and Darmstadt's second.Hannover could have levelled from the penalty spot, but summer signing Mevlut Erdinc's weak effort was saved, before Aytac Sulu, who conceded the penalty, put through his own goal to gift Hannover a point.