Earlier quoted context omitted.
Even that won’t get close. Existing London car taxes only raise around £0.2 billion annually. Not a chance in hell you can raise that by 3500% without either public unrest, or such a dramatic change in behaviour that tax collection amounts drop, instead of raise (although I would personally love a car free London).
Are you counting fuel duties here, or only road tax?
Fuel duty is also collected by central government, and none of it goes to the London mayor either.
The only taxes collected and managed by London are the Congestion charge and the ULEZ charge. Everything else is beyond the reach of the London mayor.