Which bit of the test can they not do on 4wd is it something to do with brakes aswell. Ya'd wonder why he goes to the bother to disconnect it for the few minutes,Went for the nct today. Such a shuffle to get a cert no fault of the car. Their brake tester machine that they use on 4wd's was acting up so they couldn't complete the test. I had to go back after work and got all sorted. The tester disconnected my dash cam for the test even though it wasn't connected to power. He was playing it safe.
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