My wife has been driving our car for the last couple weeks and we've discovered a few things. After a few trips it seems to default back to the Mercedes calculations of needing to multiple everything by 1.2 to get the EPA ranges.
For example, 80% (or 100% with no range charge added) is 70 miles and 100% (with range charge button pushed) is 80 miles.
If we reset all the trip settings 80% (or 100% with no range charge added) is 84 miles and 100% (with range charge button pushed) is 95 miles. It seems to default back to the conservative Mercedes settings after a trip or two.
Today I took it to work at Tesla and reset everything before the trip and here is what I came up with.
Beginning range on a standard charge (Using 28 kWh of the battery, technically 80% but measured by the car as 100% of the standard charge since no range charge was added after a full reset of everything) Trip was on a Sunday morning and Sunday afternoon so light traffic with pretty easy cruise control conditions.
Start Trip
Battery showing 100% charged
Estimated range 83 miles
Distance traveled 24 miles, 2/3 freeway driving with cruise set on 70mph, interior heat set at 72 degrees, heated seats set on low. 200 foot elevation drop and 400 up during the trip.
Energy consumption 2.9 mpkWh
Estimated range at destination=60 miles
Battery showing 78% left.
Average speed 42 mph, outside average temperature 57 degrees.
Return Trip
Battery showing 78% charged
Estimated range 60 miles
Distance traveled 25 miles, 2/3 freeway with cruise set at 70mph, interior AC set to 72 degrees, 400 foot elevation drop, 200 up during trip.
Energy consumption 3.1 mpkWh
Estimated end range 39 miles
Battery showing 53% left
Average speed 41 mph, outside average temp 76 degrees
Totals
Distance traveled: 49 miles
Battery used: 47%
Estimated range used: 44 miles.
Average energy consumption according to the car: 3mpkWh
Assuming 28 kWh of usable energy the range would be 84 miles on a standard charge and 96 miles if using 32 kWh on a range charge. Maybe a little more if the range charge allows use of 33 or 33.5 kWh.
