Search combo with enough space and good engine

Hello together, first of all, I have been driving Renault (before Laguna Limousine, then Megane II Grandtour) for many years now with a short break where I had a Volvo S40. The Volvo was a mistake, only proletarians with the electronics! We also have a 6 golf, but not a station wagon and a gasoline, the golf is ok. My Megane is now soon 10 and stands at 130tkm, I think he has earned his retirement slowly but surely. Since I have to commute in the future (30 km) and continue approx. 1 I have the 1.5 dCi in the Megane, the engine is really fine, unfortunately the 6th gear is missing which sometimes disturbs the roads when the roads are free. I currently consume 5.4 liters on 100 km, everything that is under 6 would be OK for me. Space is important to me above all length and width of the trunk, further a loading possibility would be perfect as I occasionally transport long parts. All in all, the boot should not be smaller than that of the Megane. Visually and from the equipment I find Golf, Leaon and Octavia actually quite nice but how good are the engines or which ones are recommended here and which ones are not? But the biggest problem with me, I am a technique freak 😉 My car MUST have at least seat heating, cruise control, Bluetooth, MuFu steering wheel, rain/light sensor etc.. Navi need not but display etc. would be desirable. t you recommend? Used or new doesn’t matter at first, price I have set a limit of +/- 20,000, that is of course only a number, ultimately depends on the offer. lg