Out of all the gas engines that we work on, the m112 v-6 has had the least amount of issues by far. I've had a few of the ML320s in my shop go well over 300k with no major issues aside from the normal replacement items. starter, waterpump, alternator, etc. IMO, they're close to bulletproof. And, if you do have major issues, a used one is almost free compared to the cost of a major repair. Being on the West coast, I've yet to see any rust issue on a 210 in the last 20 years. If I could find a 1997 210 with the M104 and low miles, I would own those all day long.