New model is coming (RC Trabant Combi 601)

I'm making a remote control car with a Trabant Combi body. I'm trying to make everything simple in composition and meaningful (I'm not succeeding). I want to add some new function, for example, a 2-speed gearbox or turn signals. I'm currently at the stage where the headlights, turning and drive (without gearbox) are ready. For now, in order for the vehicle to be colorful, printing with more colors is required, but I plan to finish it on a normal one. The overall size of the vehicle is 300mm by 150mm and 110mm high. Everything is made for printing on normal substrates. If you have any ideas or questions, you can write to me. Yes, the opening photo doesn't look right and I only took pictures in Tinkercad, the rest I do in Solidworks