Hi everyone.
I have a 2010 RRS that keeps resetting. When I say resetting, I mean I get lots of warning lights, fizzing and crackling and then everything dies - all electrics, steering. I'm left with a little bit of breaking. I leave it for a few seconds, restart and everything is fine. The date on the car then resets to 1/1/2009. I'm also getting random warning lights - 'vehicle lean when cornering' and 'restricted performance'. The vehicles performance is not restricted though.

Garage has checked wires for any dodgy connections but cannot find a thing. Any ideas would be appreciated.

Take it to a land rover specialist independent who know these motors like the back of their hand.....they are complex motors that need guys with experience  Visitor from fullfatrr.com
* GONE. 2012 RR Sport HSE SDV6 Orkney Grey. Now being piloted by RRSTDV8
* GONE: 2011 4.4 TDV8 Full Fat. Amazing piece of kit.
* Current. 1974 Lightweight 2.25L petrol. Old skool
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Couldn't agree more! Just wondered if anyone else had had the same problem

I had a similar issue and it was one of the battery connections not on tight enough. Sounds like you've checked test though.

Ill double check them. I'm at a point where I'll try anything

As above sounds like a bad battery connection. Make sure you check both ends of the battery leads though..also check starter connections and any earthed you can find.. 2008 G4 RRSport TDV8 current
2009 TDCi 90 current
2018 Discovery 5 HSE lux current
1994 Dakar current

Be sure to check the alternator voltage while you're there too.  Visiting from DISCO3.CO.UK
2006 Discovery 3 TDV6 Auto HSE Zambezi Silver