If it was me, I would.
You don’t know if the transfer pump is good, so you’ll want to get the fuel over the hump in the tank (so on both sides).
Make sure you prime it once changed.
Sorry - yes, as @andyfreelandy says.
I can recommend - took my F1 there when I first got it… I knew nothing of Landies. Asked them to replace the VCU and give it a good once-over. Very happy with the service given, and nice people (couple called...
When my L Series started strange misbehaving starts it was due to electrical spikes.
I disconnected the battey for 20 minutes to let the ecus clear and reset themselves. It was fine after that.
Good luck.
I had a dig-about last week and found one scathing review of a car that had been sold but was not what it was claimed to be.
However, I only found the one, and it was from several years ago.