First-half scores by striker Werner and an Omar Hawsawi own goal sealed the win as Germany were only rarely threatened by Saudi Arabia, who play hosts Russian Federation in the opening World Cup match in Moscow on Thursday.
Saudi Arabia was humiliated 8-0 in the 2002 World Cup by Germany but its current vintage, led by former Chile coach Juan Antonio Pizzi, should fare better this time around, with a seemingly vulnerable host Russian Federation up first for them in the tournament opener.
Speaking to reporters ahead of the game, he said: "We've gone over the Austria game thoroughly with the coaches and analysts".
Striker Almuwallad was unable to turn home from close range as Saudi Arabia's counter-attacking threat became increasingly prevalent. "We created opportunities to score more than one goal".
Arsenal midfielder Ozil missed the Saudi Arabia game with a slight knee problem - although he is not a doubt for the World Cup - leaving Gundogan to bear the fans' anger on his own.
The Germans grabbed a flawless start into the encounter as Joshua Kimmich's long ball found Marco Reus inside the box before Timo Werner hammered home from close range with eight minutes into the game.
Gundogan and Germany teammate Mesut Ozil drew criticism from politicians and Reinhard Grindel, the head of the Germany football federation (DFB), for having their photographs taken with Turkish president Recep Tayyip Erdogan last month.
At the other end, striker Fahad Al-Muwallad sent a low shot just wide.
German fans were reportedly angry over a meeting Gundogan attended in London in May with Turkish leader Erdogan, whom he had referred to as "my president." .
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Cheeks told police she drove from Whitehaven to Collierville with the 7 and 8-year-old children in the kennels. Skylark Blake told the local news outlet that Cheeks is "a nice lady" and he 'can't see her doing that'.
Low was frustrated as substitute Gundogan's every touch was jeered for the second game in a row.
Friday's game was the team's first home worldwide since the scandal, and while Ozil missed the match through injury, Gundogan made an appearance from the substitutes' bench in the 57th minute and was subjected to booing for the remainder of the game.
"I know that we have to improve, but when the tournament starts, we'll be ready".
Saudi Arabia's coach Juan Antonio Pizzi will have his work cut out getting his unfancied side through Group A.
There were also victories for Iran, Croatia and Switzerland, while Poland were held to a 2-2 draw by Chile.
"We gave away too many chances against a relatively weak opponent", Toni Kroos said.
World champions Germany survived a late scare to see off Saudi Arabia 2-1 on Friday and claim a first victory this year, putting a five-game winless run behind them as they finalised their World Cup preparations.
Pleasingly from a German perspective, captain Manuel Neuer kept a clean sheet in his 45-minute spell in goal.