So did a 600km trip through Switzerland, went to Lake Lucerne, Graubünden over some famous passes (Furkapass you can see in Goldfinger movie).
Here at the Rhonegletscher, the source of the Rhone river.
The car was full (5 adults + luggage for 4 days) and did a lot of uphill driving. In the end fuel efficiency was 4.5l/100km
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