few small problems bit of help needed please

[chol_gti]

hey i have a 2.0 gti and have the following issues if any1 could help that would be gr8 cheers.

1. car judders slightly and doesnt seem very responsive at all, i think it might be the maf sensor so i unplugged to see if anything differant happend but just acted the same, so could this be my problem???

2. got a noise when driving sort of a loud road noise sort of thing hard to describe, but wen i turn the wheels sightly left the noise will go, theres no knocking or anything either ?

3. when i lock my car using my key fob both doors look but boot wont lock for sum reason so its allways open when car is locked ?

4. my petrol cap doesnt seem to push in and hold, so i dont need to use the button to pop it out wen needing to fill up ??


thats it thanx in advance cheers

[Steve_PD]

1 = MAF/coil pack 
2 = wheel bearing
3 = door lock module 
4 = something do do with the catch

[Stronz]

4 = something do do with the catch

Rolling out all of the technical terms today are we??? lol 

[Steve_PD]

yeah, Ive never looked around the filler cap, and its obviously something to do with the locking catch 

[chol_gti]

i thought wheel bearings make a knocking sound?? could it be tracking or the tyre??
i think it could be to do with a catch just dunno how to fix it.
u think i should buy a new maf and see if that helps??

cheers

[Steve_PD]

Wheel bearing make a whining sort of noise  which will get louder when you go around a corner, if it gets louder going left the drivers bearing is gone ect.
have a look at the catch, make sure nothing is broken, get someone to press the button while you watch to see if anything move 
Do you have access to vag-com  thats the first place to start

[chol_gti]

no whats vag-com?
and the noise of the car gos wen turning the steering wheel left slightly but wen goin straight its quite loud?