The Hungarian made the most of that break and outdragged Lopez on the run to the first corner, blocking off the Argentinian's line through the exit.
Michelisz's lead was short-lived, however, as Lopez swept back ahead on the grand prix circuit loop with a fine move around the outside of the Honda man at the Schumacher Esses.
Lopez stretched his legs on the Nordschleife, crossing the line three seconds to the good at the end of the first lap, but after edging away again slightly on the second tour he lost a heap of time in the final sector, allowing Michelisz - plus Tom Chilton and team-mate Rob Huff - to close up behind.
But Lopez held firm, ensuring he had enough of an advantage into the final sector to hang on to his lead as he crossed the line 0.435s clear.
Michelisz came home a similar margin ahead of Chilton, who like the Honda man claimed a second podium of the weekend, while Huff grabbed his second fourth-place finish of the day despite his best attempts to pass compatriot Chilton on the final lap.
Mehdi Bennani trailed Nicky Catsburg on the opening lap but repassed the Lada man to clinch fifth - finishing just half a second down on Huff.
Sportscar specialist Catsburg did finish best of the Lada Vestas in sixth, while Polestar pair Fredrik Ekblom and Thed Bjork both enjoyed eventful races on their way to seventh and eighth, with the latter battling his way past Gabriele Tarquini at Dottinger Hohe on the final lap.
Tarquini, who before the race spoke of taking a more cautious approach, headed Lada team-mate Hugo Valente for the final points positions.
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