Sound and vibration – that’s the question. I had the same challenge, when I had to choose a while ago.
The 520d is an excellent engine if not the best of its kind, but it is still a 4-cylinder diesel – just like the Mercedes 250CDi – they both sounds like tractors, though well dampened.
My choice was the 525d with the 8-speed automatic, and I love it. The ride is extremely smooth and the sound is wonderful compared to my old but excellent 2 liter diesel.
If gadgets and fuel economy matters the most to you, I would recommend the 520d, but if the engine sound matters theirs no choice – the 525d wins every time…
So look into yourself and decide what matters to you!
/Peter
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