2 hours to replace a number plate light bulb. corroded screws meant stripping out the tailgate internal panel, dissing the lights and locking mech, removing the 4 nuts holding the external plastic light housing. bench work then, using multitool, narrow-nose pliers, WD40 and any other bits that came to mind, remove rusty screws, cut wire to light, clean out light fitting, fit bulb, reassemble, solder wires and heat shrink, refit light with 4mm nuts and bolts, fit back in tailgate, rebuild all the bits stripped out. glad i'm not an auto spark.