Hi guys, recently bought a w210 e430 avantgarde. Nice ride except I'm having some electrical problems related to the key. The key itself is a little worn out. The previous owner seems to have had the habit on biting on his key. There are bite marks on the part which goes into the ignition lock. Ok , so the problem is sometimes my horn and the sunroof doesn't work. It will work as soon as I wiggle the key around a little. I can hear some clicking sounds as well when I wiggle the key. Checked fuse#41 it's good.
Do you guys think the issue is with the key or the ignition lock itself.
I only got one key with the car.

Thanks

Pics of the key


Foggy lens