OBDeleven website:
Then turn on the ignition and select reverse - if the sensor is working the radio display will show the reversing sensor diagram and be screaming as if you about to reverse into something. If selecting reverse still gives the 3 second 'error' beep then recheck the harness connection and carefully check where you cut the harness free in step 4. If you look underneath the drivers door handle, there is slot in it which you can put the end of your key in an twist it (careful of the paintwork) and off will pop a plastic cover. There will be a lock under that to open the car with the key if the battery fails to unlock remotely.
The Adaptive Frontlight System with light sensors enhances safety by changing the geometry of the light beam to adapt the light pattern on the road to differ

Tighten the four bolts to 10Nm + 90°. Turn the engine through two revolutions in the direction of engine rotation. Set the valve timings to the TDC mark of cylinder 1 (same setting as stated in the ‘Removal’ section) Check the timing belt tension reading again. Assemble and finalise in the reverse order to removal.

Think the Stream mp3 hu was introduced around 56/07, which has aux-in capability, though even if you find an earlier model with the standard Stream it's a doddle to retro-fit an aux-in, at the expense of the cd-changer. Have a Google for "Connects2 adapter", or better still search here on the forum. It was for the MY07.
in this video is shown how to replace timing belt and coolant pump on skoda octavia with 1.9tdi engine same procedure for vw golf mark 4. 5rQtBo.
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  • how to turn on aux in skoda octavia