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I have recently realized that in my stop and go short distance daily driving ECO mode is the most comfortable. I would like the ECO mode to be my default but here is my understanding:
COMFORT is the default mode that Mercedes has decided is good for you. You can change settings to enable it to ask you at start but this only works if you selected ECO for your last drive (Mercedes has decided this mode is not good for you). If you missed the flash by option to change mode during a drive, then it will not ask you again.
Yes, your understanding is correct, but perhaps incomplete. ECO mode is not suitable for all driving as it throttles the car's power as well as the HVAC, so it's deliberately not the default mode as it might not cool the interior as desired or you might not have the expected acceleration if you need to get out of a jam in an emergency, so it should be selected deliberately based on the driving situation, just like Sport or Sport+ is meant to be selected for more spirited driving.
Comfort is the all-round mode for normal driving, giving full power and throttle response and 100% HVAC and the mode the car was homologated in. The latter requires it to be the default mode per regulation. MB is not allowed to make any of the other modes the default mode as the EPA certification and everything was done in Comfort mode. Per regulation, the other modes have to be deliberately selected by the driver, so that's why the best they can offer is that 3 second prompt where you have to deliberately confirm that you want the previous mode restored. They also wouldn't wanna do the homologation in ECO mode, because as said in hot climates ECO mode may not sufficiently cool the interior.
The default mode can be changed via coding if you really want to. You'll have to contact one of the remote coders that frequent this forum such as BenzNinja.
Last edited by superswiss; May 15, 2025 at 09:30 PM.
I have recently realized that in my stop and go short distance daily driving ECO mode is the most comfortable. I would like the ECO mode to be my default but here is my understanding:
COMFORT is the default mode that Mercedes has decided is good for you. You can change settings to enable it to ask you at start but this only works if you selected ECO for your last drive (Mercedes has decided this mode is not good for you). If you missed the flash by option to change mode during a drive, then it will not ask you again.
Is my understanding correct?
As @superswiss mentioned, you'll have to code the car if you want to have eco selected at every start without intervention. The next best thing is the mode selection on every start up enabled in the settings.
I had two c300s coded for mode memory so it doesn't automatically revert to comfort every start. Definitely convenient, but it may not be worth the price if that's all you're interested in coding.
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