We've all got electric vans at work. Mine's a Peugeot. Lift little switch to apply "parking brake". Lift it again to release said device. Or, stop van, take keys out, automatically applies parking brake. If in drive and parking brake is applied, just press accelerator and it disengages. Simple to get used to after a while. My mrs has forgotten to put her car handbrake on twice, and stalled it twice when she forgot it had a clutch and gears.
The Mercedes vans at work have a small pedal for the left foot to apply the parking brake and a small lever under the right of the dashboard to release it.
Bring back the big clicky handle with a button on the end between the seats!