Johan De Haes
Test driver
This is the Mercedes C-Class C 300 e break plug-in hybrid. In this range test, I want to discover the range on the highway in real driving conditions to find out the minimum range of this car. I only did the test on the highway and not again separately in the city, because I noticed that plug-in hybrids do not have that much difference on them. Feel free to read up on my test with the BMW X3 xDrive30e PHEV and the BMW 530e xDrive Touring PHEV, where I did test on the highway and in the city.
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This is the Mercedes C 300 e break plug-in hybrid with the 25.4 kWh kWh battery. It has a WLTP range of 94 – 107 km. The Mercedes C 300 e has a system output of only 313 hp. It goes from 0 to 100 km/h in a 6.2 sec. The base price of the Mercedes C 300 e is €64,977.
I will test the range at higher average speeds on the highway. I want to know what the minimum range of this car could be. I did the test in July and it was between 21.5 and 23 degrees during the test. At the beginning of this part of the test, the battery is at 100%. After 24 km, the battery is at 75%. At 50% battery, we drove 49 km. After a distance of 73 km, the battery is at 25%. We drove the battery completely empty and had driven a total of 97 km. The average consumption came to 19.8 kWh.
Battery% | Distance (km) | Consumption(kWh) | Temperature (°C) |
---|---|---|---|
100% | start | 21,5 | |
75% | 24 | 19,7 | 22,5 |
50% | 49 | 19,7 | 22 |
25% | 73 | 20,1 | 21,5 |
0% | 97 | 19,8 | 23 |
Now let’s do a charging test with the Mercedes C 300 e. This PHEV is equipped with a combined charging system. With this system, the Mercedes C 300 e can be charged with both AC and DC. For this test, I am going to charge the car on a DC fast charger. This C 300 e can fast charge at a speed of 55 kW. At the start of the test, the battery was at 0% and it was 23.5 degrees. At the beginning of the test, the on-board computer indicated that it would take 24 min to fully charge. We finally knocked off 25 min to charge from 0% to 100%.
Start test | After 10 min. | After 20 min. | After 25 min. | |
---|---|---|---|---|
Range indicator (km) | 0 | 40 | 82 | 99 |
Increase range (km) | 40 | 42 | 17 | |
Battery (%) | 0% | 39% | 82% | 100% |
Charging speed (kW) | 55,5 | 45,7 | ||
Temperature (°C) | 23,5 | 23,5 | 23,5 | 23,5 |
We also did an AC charging test. The Mercedes C 300 e features an 11 kW on-board charger. In our test, it took 1h53 min. to charge the battery from 0% to 100% at a rate of 11 kW.
During a drive where we drove mostly on the petrol engine with a depleted battery we ended up with an average consumption of 6 liters. We drove 108 km on the petrol engine and 12 km electric.
During an even longer drive we drove 554 km with the petrol engine and 161 km electric and there we arrived at an average consumption of 5.8 liters and 1.5 kWh. This was during a drive on vacation where we drove a full trip with only 1 battery charge.
In conclusion, the range of the Mercedes C 300 e break plug-in hybrid on the highway is around 97 km, based on similar driving conditions and measured at high temperatures between 21.5 and 23.5 degrees. In town, you will probably have a similar driving range or a few kilometers more. I suspect that at much lower temperatures you will get much less range.
You can fast charge DC and then it takes 25 minutes to fully charge the battery. On the slow AC charger, it takes 1h53 minutes to fully charge the battery.
Fuel consumption with a depleted battery will be around 6 liters per 100 km measured at higher temperatures of around 23 degrees.
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