-As I'm about to approach an intersection, all of a sudden a taxi in front of me hit the brake and pulled over to drop off the passenger. A train is running the next lane so I'm forced to stop my car in the intersection. 3-5 seconds later, the taxi started to move and I followed it. So what? Well... the very next moment, a traffic camera on the roadside gave us a yellow flash, respectively. Looks like I got caught on the camera(yellow light running?). My mistake!

here's the deal; if this was a rental, the car rental company will pass the fine on to you, the fine is determined by the elapsed time when the light turnied red and when the camera flashed plus your speed. since your speed will be slow, it would be obvious you were stuck in the intersection. regardless you'll get hit with a fine, i'm guessing about 55 euros (or about $70 in "real money" ) that's a fact.
but consider had you ran the light 14 seconds after turning red and speeding thru it, you'd lose your license in Germany, only can guess what they would have done with a rental.