2000 VW Beetle airbag light on

Your car don't like the new / copied key your using. The way those keys are made, have another key made using the original key.

It is probably the sensor on one of the seats telling the wrong message to the computer $800 fix

The drivers side door latch is bad. Just replaced one in my daughters 99 beetle. $184 dealer part. same thing no lights then alarm will mgo off for no reason, lights will come on at random times while driving, no chime when key is in.

Check out faxon auto literature. They list the original VW service manual for your car.It should have the wiring diagram that you need but you could confirm that with them before you bought it. I've used them befor and had excellent service. Hope this helps.

Malfunction indicator light it is the symbol of your engine with a line of suffering and the word "CHECK" -- this could be something minor like needing a spark plug to be replaced (common problem) or to something more serious like engine electrical work needed. a flashing engine light is the more serious so you are not to worry.
keep this handy: http://www.newbeetle.org/forums/2-0-liter-gas/39141-where-can-i-find-warning-light-diagram.html

There should be a diagram in your Owner's Manual. I have one for my daughter's 1998 Beetle that should be the same as in the 2000 Beetle. Can email it to you if you post an email address that I can send it to.

There is a recall out for crash sensors. Call your VW dealer to have this checked and replaced for free under the NTSB recall.

could be loose connection or bad sensor,must be repaired then code cleared out

The problem is the seatbelt latch. The wiring right at the latch and the strap are broken. Seems there is not enough slack in these wires to allow much stretch. You may be able to repair it if you can splice these wires back together if not about 160 to 170 for a new one. you can have it put on a machine and if the code leads back to the latch then you know this is the problem.

did you go through all the checks i suggested?