I have a 406 1.9 TD 1997 and have been trying to adjust the headlight beams by using the adjustment knob under the steering wheel. Even on the nornal '0' setting they are still too low, so that the main beam is far too close to the car, on the road surface. Is there any way that I can get an extra couple of degrees on them (upwards, of course). Thanks in anticipation of help. Eric