I am looking at a 1991 300SE with 122,000 miles. The miles don't scare me, but how durable and reliable is this engine? Any response welcome. I have an 83 240D with 123,000 miles and a Olds Ciera with 258,000, so mileage is acceptable. But could I drive this MB for another 10 years?<br> How's the engine? Minor repairs okay too.