I think issues are a part of FGC ownership. My friend who bought a used S5 (V8) last year texted me today. All 8 direct injectors are being replaced on his car under warranty. Car doesn't even have 60k kms on it. That said, my dad has been very fortunate. In 3 years and 100k kms, his 06 E320 has only needed a thermostat and a water pump for unscheduled repair items. The rest is regular maintenance. Even his old 2000 ML320 has been relatively free of major issues. Can only say that he's been lucky since the W163 MLs on average weren't known for being issue free.