I was wondering if anyone else had experienced a fault like this, or if anyone had any idea what it could be.
After the 40k service the start/stop wasn't working anymore so I had the dealer check the battery health and charging and they said it was fine.
A few weeks later I get in the car to start it, all dash lights etc are on as normal but as soon as I turn the key to start nothing happens and all the dash lights go off, totally dead no electrical power. Recovery guy comes and opens the bonnet and starts it with his starter thing first time. I speak to the dealer who tell me its probably the battery so I get it replaced (not by the dealer though).
About a month later everything is fine, start/stop is working again too (so I know the battery is healthy). I'm sitting in traffic, autostop has stopped the car, I put my foot on the clutch to restart and poooof all power off again. I cannot restart. When I slam the door I get the dash lights back on but when I try to start they go off again. After a few times of slamming the door the lights stop coming on.
While waiting for the recovery man I start trying to check the fuses and read online that the main fuse might be under the bonnet; I take a look but cant get the fuse box cover open so slam the bonnet slightly harder than normal. I get back in the car, all the dash lights are on, it starts and I drive home.
Obviously the battery connections have been checked to make sure they are not loose and the dealer has done a check of the earthing points but thats about it.
I have spoken to Hyundai UK about this issue because I am worried it could cut out at high speed; their response is pretty much "we won't say either way if your car is safe or not but if you die in a horrible car crash please let us know"
Anyone got any ideas?
Thanks for reading.