Key fob not working

[Jasper_Boxst]

Try "flipping" the battery as that might do the trick since you mentioned to LED comes on. This resets the processor in the key.
TSB 17/03 9662

2. Restarting the processor.
2.1 Remove battery as described under Step 1.2. (Normal removal of battery)
2.2 Inserting battery briefly with polarity reversed.
2.2.1 After a waiting time of at least 10 seconds, slide battery with the polarity of the battery reversed (positive terminal downwards) under the tab (Figure 1, arrow 2).
2.2.2 Clip battery downward into the holder.
2.2.3 After a waiting time of approx. 3 seconds, remove this incorrectly polarized battery again.
2.3 Install battery as described under Step 1.3. (Normal battery installation)
2.4 Check the function of the remote control.

Cliff Notes version: Pull the battery and wait 10 seconds. Install it reversed for 3 seconds, remove it. Reinstall battery correctly and try it.