Hello Elchgemeinde! I intend to buy me a car.- cooler for our 3 weeks Sweden vacation. Of course this 220V~/12V duo connection should have around 35 liters of capacity. Have your suggestions/experiences for a good cooler in the segment up to approx. 100 Euro? Furthermore, I would like to install an additional “12 V socket” (cigarette lighter) for this cooler in the trunk area (V70 I T5). Is there a cheap installation place back there, where appropriate cab can be tapped? I would be grateful for suggestions, installation instructions and part numbers (passing cigarette lighter).