So the rear subframe of my SLK completely failed on Saturday night. This caused me to lose control completely of my vehicle. Luckily I managed to stop it, but believe me it was very close to ending horrifically...reading posts around this I’m concerned there’s a trend. My MOT was carried out in March with no advisories. Serviced in January. My garage are shocked and upset about this, as there was no sign of corrosion and they believe it’s corroded on the inside. How can this happen and be ok? Any idea if I’d be able to take this further with Mercedes?