SSR Performance driver Bortolotti was unable to take the start in the second race of the weekend after the technical issue that first appeared in qualifying couldn't be fixed in time for the formation lap.
But having dominated Saturday's opening contest to score his first DTM win, the Italian driver was well versed with the conditions at the Nurburgring, and he put his knowledge to good use to help Lamborghini claim a double win on the home turf of its German rivals.
Standing in the garage of Grasser Racing, the outfit with which he competed in the DTM last season, Bortolotti advised the crew to increase the tyre pressure at the next pitstop in anticipation of more rain.
"Mirko was standing next to me and said: 'Boss, we have to drive at high pressure'," Grasser boss Gottfried Grasser told Autosport sister site Motorsport-Total.com. "I said: 'Rather not'.
"He was then like 'Boss, we'll do that, high pressure works,' I then put high pressure on his recommendation."
The call proved to be a masterstroke as Paul, who had been no match to race leader Lucas Auer in the first stint, was suddenly the quickest driver in the field after the pitstop phase.
Competing in only his first race weekend after being drafted in as a last-minute replacement for Mick Wishofer, Paul rapidly closed in on the Winward Mercedes of Auer with a fresh set of wet Pirellis and finally completed a move at the hairpin after duelling for several laps.
Source: Autosport