The ICE 4 ,today in picture on the website of märklin!
The red ICE 4 39714 https://www.maerklin.de/...te/details/article/39714

The green ICE 4 39716 https://www.maerklin.de/...te/details/article/39716

The supplemantary set 43724/43726 https://www.maerklin.de/...te/details/article/43724 https://www.maerklin.de/...te/details/article/43726
The
And the wagon set 43725/43728 https://www.maerklin.de/...te/details/article/43725 https://www.maerklin.de/...te/details/article/43728

Why the supplentary set of the green ICE 4 set is 30€ more expensive of the the supplemantary set of the red ICE 4?

Good question; and just looking at the images there is no difference in the images one can easily spot. They all have red stripes, so unless the difference is in the tiny wagon numbers or some detail that you are hyper concerned about, I don't see why one doesn't just use buys the cheaper version. There appears to be a difference of some sort to run a separate part number.

My guess is there is something about the details/run of the green version that is different in the signage or printing or car numbers on the middle area of the train. If you look at the center print area, there is a difference in the numbering there. So I suspect its supply/demand; they expect less demand for those vs the red makeup train.

The pictures are CAD images?

Don't think so. In the new Maerklin Magazine German edition (MM-GE) 06/2019 page 8 above is the announcement for this 2 different colour versions.

But of course no remark about the price. I think, if you want to be politically correct, you must buy the green version. And it is a must to pay more for your poilitcally correctness. I ordered the red (gimmick free) version.

True, but the only thing I can imagine that would be different between the 'red' and 'green' versions of the add on cars - where the strip is red in all cases - is some tiny difference that has to do with the specific route the green ended trains run, or some other tiny exterior marking. So its a matter of having to look at the tiny details. In the end I expect that the difference is in some tiny detail, regardless of what the photos in the catalog look like... I was just trying to see if I could see any difference, and that's the one spot I saw a difference.

No. Please read this publicaton of the DB AG, Berlin:

"Extract of the press release

Deutsche Bahn (DB) is making its role as an environmental pioneer visible on its trains by changing the exterior design of its 280 or so ICE trains: on the two cars with the striking ICE profile at the top and at the end of the train, the red stripe is replaced by a green one. [...] An additional green plug symbol shows that all long-distance trains run on 100 percent green electricity. [...] The green ICE is the right signal at the right time.""

Translated with www.DeepL.com/Translator (free version)

It is a political statement. A reason for me to avoid any transportation with this service provider, whenever it is possible. I do not support political lunacy and antidemocratic attitude. Especially if it is a 100% goverment owned company as a DB AG is.

It’s not necessary a political statement. In Europe even private companies in some areas can boost their sales by ”being green” statements. It’s hard to compete against road and air transportation, and without the ”green” factor, there wouldn’t be those billion Euro investments in European railways as we have right now. Note that I haven’t said that I like this impact from the climate debate, or not.

Well, only answering your own very off-topic comments.....

Per

follow the discussion about how the database was showing the (allegedly) wholesale price.