Problem with starting a BMW 6 Series gasoline engine from 2013: Possible parking heater problems

Hi, this sounds like a similar problem I had with my 2011 BMW 5 series gasoline. I would describe myself as someone with limited experience with cars. My problem was actually a faulty glow pin. I went to my regular garage and we sorted it out together. It cost me around 560 euros. Could you tell us a bit more about your 6 Series? Which model exactly? What mileage does it have and what about the maintenance history? This information could help to get a more precise overview of the cause of your problem.

(Translated from German)

Hey, thanks for the quick reply! So the model is a 650i. It already has 137563 km on the clock and the last service was recently. I really don't know anything about it and just wanted to drive it to work. Hopefully it won't be too expensive to repair.

(Translated from German)

Hey, thanks for the additional info. So, if it's your 650i, it could also be the battery or the starter motor. The parking heater usually draws a lot of power and if the battery is low, the engine may not have enough power to start. Make sure your battery has enough juice. If that doesn't help, it may be that the starter is not transferring power from the battery to the engine. In this case, the starter motor should probably be replaced. If it really is the parking heater, then the cost to fix it could be quite high. Hope this helps, let us know how it turns out!

(Translated from German)

Thank you for your willingness to help me. Your suggestions sound very plausible and could actually be the reason for my problem. I'll check the battery and starter motor. I realize that repairing the parking heater won't be cheap. I'll let you know the result as soon as I know more. Thanks again!

(Translated from German)