After adding up the things I needed to fix before I could rely on my 1st Gen '93 W250 I decided it was time to replace it. I found pretty much the same truck, updated to 2006 technology, at my local dealers and was able to buy it. I love the truck, though I must admit that I miss the raw diesel roar of my '93. Last week, with somewhat less than 300 miles on the odometer my "check gauges light" (little engine symbol) stayed on. The dealership's service department said it was input from a battery sensor to the ECM and was a known problem with an ECM reflash fix. They reflashed the ECM. All was well until yesterday when the full time check gauges light reappeared. I took it into the service department again, they reflashed it and this afternoon all was well. The service department did not seem to feel that the problem is fixed, and I sure don't. Has anyone else experienced such a repetitive problem with their 2006? The specs on mine are: 4WD standard cab 2500 with auto, and of course diesel.