I can't open my boot of my Mercedes-Benz E Class electrically - is this a known fault?

I've got a Mercedes E320 CDi and I've started to get warnings on my dashboard display concerning the left and right hand rear number plate lights and third braking light. The frequency of these warnings occurring is increasing. Also, when the warnings occur I cannot open the boot electrically, only with the key. Is this a known fault with the Mercedes-Benz E Class? Am I looking at great expense to rectify?
That reads like a broken wire in the wiring loom from the car body to the boot lid.
Answered by Honest John on

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