That calculation seems a little off... I don't know what ADAC takes into consideration for that calculation, but either of the cars in my family operate at arou

That calculation seems a little off... I don't know what ADAC takes into consideration for that calculation, but either of the cars in my family operate at around 16 Km/L on long distance, mostly motorway/autobahn (and neither will be as efficient as a Golf VII which may be closer to 20) and I don't know how much petrol/diesel costs in Germany right now, but it's probably not too far off £1.15-1.20 per litre in the UK at the moment (quick google suggests 1.43€, exchange rate of 1.4 so actually a little cheaper.) 550 Km/16 = 34.4 Litres of fuel at 1.43 a litre gives around 50€ per direction. I don't know what the tolls are like but I wouldn't cost in vehicle cost or insurance (both sunk costs) but maybe a portion of servicing costs (1/30th of a 15000Km service interval) so let's say worst case allow 20€. So actual cost of journey more like 70€ per direction, which is A LOT less than 247€ that ADAC is suggesting, and still 50€ less than the train. I'm not trying to advocate for the car, (I much prefer train travel - especially on DB) but based purely on costs, it doesn't stack up... BTW, train prices are similarly stacked in the UK, with it rarely being more cost effective to take a train unless the convenience factor is a major part, like going to central London...