@tango:
If, when operating the [manual] headlight adjuster from inside the car, the headlight beam moves up and down together then that operation is working fine. If you feel your beam alignment is too low (bearing in mind you are sitting higher than most other car drivers so your perceptive field of vision will differ) then I recommend taking it to a MOT testing station and asking them to inspect and/or adjust your headlights. There are two 'adjusters' on the headlight (5mm Hex/Allen key I think); the ones innermost (towards centre of vehicle) are for the up/down adjustment and the outermost ones are for left/right adjustment.
If the electronic adjusters don't operate then take a trip over to Renualt who will offer to sell you a new one. They should test your old one first though.
PEASE NOTE! Any manual adjustments made to the headlights (i.e. directly from the headlight units) MUST be made with on a flat surface, car not running but ignition on, Auto Parking brake OFF and NOBODY in the vehicle. This also applies to vehicles with factory fitted Xenon headlights.
@John J:
Our offside (drivers) automatic headlight adjuster did the same thing; would work, wouldn't work and 'wiggling' the cables to it resolved it short term... ultimately it stopped working altogether and a new one purchased from Renault (approx £50 incl VAT) resolved it. The Headlights fantastically realligned themselves too once fitted (i.e. not just up/down together, but rather left up, right up, left down, left up, right down, right up then together). Bizzarre but cool!
The cable is really awkward to get off and taking the headlights out are a much easier (and safer) option in the long-run (plastic trim removal and two bolts).
Both of you - let me know how you get on, thanks.