Can you do this with the vagcom or does it need to be taken to a dealer?

 

Your question makes no sense.... Rephrase it.

 

Depends on what you mean by reprogram - if you mean "remove CEL, clear codes, etc" then yes. But if you're talking about a reflash for a more performance-oriented programming, no - that requires spending money for a new chip.

 

yes you can, your question does make sense

one of the values you can adjust allows you to change the number and that will adjust the idle

Idle Speed Adaptation:

With engine warmed up, at idle:

[Select]
[01 engine]
[Adaptation - 10]
Enter channel 01
Enter an adaptation value between 124 and 132
[Save]