So, as anyone on this thread knows I take a keen interest in my EV’s efficiency and range, especially as I’m now on my third one.
Having tested the EQE on a commuting week and gotten all 5 shifts (300 miles) with 24 miles of range left, I was intrigued to see what a proper motorway journey would bring.
Last week I drove from Gloucester to Prestwick with a small detour to see my parents

near Preston - total distance would be 366 miles. I was never making that in one go anyway but a bit of playing around with ABRP and ZapMap gave me a plan which involved me getting to Cairn Lodge Services on the A74, which hosted a rapid Westmorland charging setup (same company as Tebay and Gloucester services!)
Normally, I would do this sort of nonsense as if have family in the car, and always charge when stopping for pee/food/rest etc. When it’s just me, I have free reign to drive like a moron and be THAT sort of EV driver that everyone else THINKS you drive like…
To make it more interesting, I recently discovered the car has an inbuilt dashcam, and just requires a USB C drive in the correct format to record. One old SSD later and I have days worth of recording space as it’s only 1080p. Add in my GoPro to record the dash (poorly) and it’s made a fun video!
The final figures:
Got to my parent’s house at 160 miles on 4 mpkwh (which is the 250 whpm on the dash because Mercedes refuse to use the figures everyone else does) but an average speed of 34mph because it was a Friday afternoon on the M6…
Got to the charging station right on 320 miles with 2% battery left (I wasn’t scared, honest) and the increase in average speed to 44mph over the whole distance had dropped the efficiency to 275 whpm or 3.63 mpkwh.
I left it on the rapid charger for 30 minutes while I got snacks and did the last 40 miles cross country to the hotel at Prestwick.
Beast of a journey with all the traffic but ridiculously easy in the EQE with adaptive cruise, air suspension and nappa leather. Cruise was set to 70 and only rarely was that exceeded to get passed others.
Return journey this Sunday!