Sealey fuel tools sealey vs555 this diesel fuel priming set from sealey features the latest male and female quick connectors found on fiat ford land rover mercedes psa renault rover and vauxhallopel vehicles designed to work in conjunction with the low pressure fuel circuit to reintroduce fuel back up to the fuel line after maintenance clear pipes allow visual detection of any air within the fuel system or any air being inadvertently drawn into the fuel line two universal connector