Fuel Economy Guage goes into red when engine off
I took the car in for service and they replaced the distributor and spark plugs. Now the fuel economy gauge goes to the extreme right (red zone) when I switch off the engine. Prior to the service, it used to go to the extreme left (i.e. no fuel being delivered), which I beleive is normal. The economy guage works as per normal when I am driving.
Is this a problem and what would cause this to happen?
190E 2.3, 1988