TDI engine and service life

Dear A2-experts. Last time I chased my A2 (almost 173tkm) over a long stretch (2x 650km) (tempomat constantly in at 180), that I almost get a bad certain. Over this weekend I was 500km with my 1,000 kg caravan, mountain and valley, on the way. Question, does full throttle 4,000 U greatly reduce the life of the engine?