Okay, thanks...again, I was just wondering.

On my Ford, the GLOW PLUG light lights up whenever the plugs are activated (there's a controller that senses coolant temp; depending on how cold the engine is, it will cycle the plugs on and off for up to a minute after the truck fires off, to help curtail white smoke in the morning), so I had assumed the Benz was the same way (i.e. the light lights up whenever the plugs are on). That's what I get for assuming, eh? Speaking of which, I assume the plugs are 12 volt...? Especially with a duty cycle like that. Ford Mickey-Moused the plug setup to allow for faster starts by taking 6 volt plugs and applying 12 volts to 'em. If they're on longer than 8 seconds without a 10 or so second rest, they'll burn themselves out...sometimes breaking the tip off and forcing you to pull the cylinder head to get it out.

Again, I'm not new to diesels Just new to diesels as refined as these...I rememebr how amazed I was when I found out that these engines aren't governed somewhere in the 3500 RPM range. Due to the governor and low gearing, my pickup can't go faster than 75, and it's really complaining at 70...