I have always wondered what sort of danger of overheating could occur if a MB 5 cyl turbodiesel engine, or any other MB diesel for that matter, has run hot before shutting it off. On very hot days while driving home with the A/C on especially on the last 2 mile stretch which is all uphill, my 300D was at or near the 100°C mark by the time I get home. It seems to still climb a bit more by the time I have parked it in my driveway. I've always been worried that it may reach the overheated range after it has been shut down though I've never checked. About a year ago my old coolant overflow tank burst from sitting after one of those hot drives. It had sounded like a coffee maker before it happened. I fortunenatley still have an intact head gasket. Now I just shut the A/C off on the last 2 miles to avoid any problems but the nagging question remains.

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DJ


84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012