You might find it in the acr's owener's manual.
Basically you have to find the back of the headlamp assembly and then turn the part where the wire goes in CCW a little bit and pull the bulb out.
Sometimes the whole lamp socket turns, sometimes it's a dollar, but essentially it's a bayonet mount like a camera lens.
Clean the new bulb with alcohol and do not touch it - the oil from your finger will contaminate the glass and cause premature failure.How to change my headlight bulb?VW are always fairly easy to do routine fixes on.
%26quot;It's very easy to change the headlight bulbs. They just twist about 45
degrees and pull out. Disconnect the connector first. Don't touch the glass
on the bulbs and be sure to clean the new ones with alcohol just in case
someone else did. The high's are 9005 and the lows are 9006 (i think). PIAA
is in the process of making their superwhite bulbs in these sizes. They
should be available in 100 watt ratings which our cars will handle without a
problem. Each bulb has its own circuit and fuse and the current draw is
within limits of the wire size.%26quot;
Found this online, hope it helps.
The rest of the forum is linked below.