Stopped here to shop and use the laverie. There are no gates on car park, and laverie is 24 hours, so likely OK to stop overnight too but haven't tried.
Intermarche Super avec laverie automatique 24h / 24 (laverie)
Intermarche Super with 24 hour self service launderette (laverie)
Intermarche Super mit 24-Stunden-Waschsalon (Laverie)
Stopped here to shop and use the laverie. There are no gates on car park, and laverie is 24 hours, so likely OK to stop overnight too but haven't tried.