OPC warranty extension

[m88ony]

Was visiting my local OPC to have new tyres fitted and whilst having small chat with the service manager he advised that my OPC will start charging to diagnose a fault.

I have the Porsche warranty extension and he advised that even with a warranty customers will still have to pay money to diagnose a fault.

Are other OPC’s the same? Charging for a car with no warranty I get but the USP of the Porsche warranty is that they just get on with it and fix it.