I previously used an iPhone 5 plugged into the iPod port using an Apple cable. No issue with music playback or more importantly charging.
I have now plugged in a iPhone 6, again no issues with music playback, however it would appear the car is now discharging the phone !
A short journey this morning lasting 15 minutes seems to have confirmed this,the phone when I left had 32% charge, at the end of the journey the phone was dead and the car is unable to charge it ?
No fault with the phone, when plugged in at home it's charging without issue.
Anyone had similar issues ?

Not had a problem with my Iphone 6 charging in the car.
Have you tried another cable? MY13.5 Autobiography, Santorini Black, Privacy Glass. Gone
Driving a milk float for now.

I will get a new cable from the box and try again. I keep the same cable in the car which I used on the iPhone 5 and it has no issues. I did wonder if perhaps the iPhone 6 needs slightly more power ?

Ye I have the same cable as I had for my 5 and no problems.
I did have a problem with a cable i used indoors that went bad. MY13.5 Autobiography, Santorini Black, Privacy Glass. Gone
Driving a milk float for now.

Had the same problem, turned out to be a bad cable, new cable and all ok now  RRS SUPERCHARGED, 22 INCH ALLOYS, JAVA BLACK, FULLY COLOUR CODED
EVERY POSSIBLE SOFTWARE UPDATE INCLUDING - BLUTOOTH UPDATE, SATNAV ON THE MOVE, CLOCK ON DASH, 3 CLICK FLASH, GEARBOX RESET, COMPRESSOR UPDATE AND SUSPENSION LOWERED,
BLACK CODE RE-MAPPED, AUTOBIOGRAPHY'D, NEW EXIDE BATTERY, NEW DENSO ALTERNATOR

New cable in the car now ! Will see if it makes a difference.

I got a in car charger for my iphone 6 at Christmas, would only work with my wifes 5 though, kept coming up with device not compatable, despite us running the same software version, very odd.
sent it back in the end 07,TDV8,Black, Black Heated leather all round, Rear Entertainment with Headpones & Remote, TV, DVD, Pure Dab Digital Radio, Sidesteps, Adaptive Headlights, sunroof, now working fuel burning heater )))