Interesting vid. The Tundra in my sig is pure mechanical, the RX and Honda are all electric, but the Mercedes has both mechanical and a couple electrics on the front of the engine; and when comparing engine temps in extreme conditions (never scanned the RX) with my SGII, I've found the Mercedes to easily be the most effective. Of course the others are just fine, but the MB seems to be the most "stable."
I've never seen the Benz exceed 100*C even in the most extreme conditions, think 120*f out in the desert with the A/C blasting and climbing up a mountain pass at somewhat slower speeds. It has a "real" temperature gauge that is always reflecting what's going on in the engine, rather than a dummy gauge, and you can enter diagnostic mode with climate control unit to get an accurate temperature readout digitally accurate to 1*c apparently. In any case, in the same conditions I've seen the Tundra and Honda both exceed 110*c, still not too alarming given the conditions, but the big Benz V8 seems to top out around 100*c and not go any higher. Of course when you pop the hood on a hot summer day all have a lot of air moving, but the Mercedes has A LOT more air moving around the engine bay than anything else I own, perhaps they are onto something.
I've never seen the Benz exceed 100*C even in the most extreme conditions, think 120*f out in the desert with the A/C blasting and climbing up a mountain pass at somewhat slower speeds. It has a "real" temperature gauge that is always reflecting what's going on in the engine, rather than a dummy gauge, and you can enter diagnostic mode with climate control unit to get an accurate temperature readout digitally accurate to 1*c apparently. In any case, in the same conditions I've seen the Tundra and Honda both exceed 110*c, still not too alarming given the conditions, but the big Benz V8 seems to top out around 100*c and not go any higher. Of course when you pop the hood on a hot summer day all have a lot of air moving, but the Mercedes has A LOT more air moving around the engine bay than anything else I own, perhaps they are onto something.
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