Just replying to some of the stuff in this thread off the top of my head.
Sportline, Edition & Pacific are the ones that have body coloured handles etc.
Edition & Pacific models were introduced in 2008.
Edition kind of replaced the Trendline models and added a few things. The Edition is available with a 1.6L petrol engine or 1.9L turbo diesel. The petrol came with either a 6 speed tiptronic (regular automatic which can be shifted manually) or 5? speed manual. The diesel came with either the DSG (twin clutch "automatic") or 6 speed manual.
Pacific replaced Comfortline & Sportline. It has all the stuff like fog lights, sporty seats, dual zone automatic climate control, auto dimming mirror, auto lights + wipers etc. It was available with a 2.0L petrol engine or 2.0L turbo diesel. Like the Edition models the petrol was offered with a 6 speed tiptronic automatic or a 6 speed manual, the diesel was offered with a 6 speed DSG or 6 speed manual.
I don't know much about the older Trendline/Comfortline models to be honest because the Edition/Pacific models came out when I started getting into VWs.
The Trendline models have the black handles etc and don't have steering wheel controls... that's about all I know feature wise
The Comfortline has the black handles etc, auto lights + wipers, semi-automatic air con and it has steering wheel controls.
The Sportline added things like different alloys, fog lights, dual zone climate control and better seats etc over the Comfortline and of course the colour coded handles and bump strips on the front.
Cars are advertised as "tiptronic" instead of just "automatic" because it means they have a manual shift option either by using the gear shifter or with paddles on the steering wheel (note: the normal Golf models don't have paddle shifters).

This is my Golf's shifter. If you push it to the left when it's in Drive then it goes into tiptronic where you can shift manually by pushing/pulling the shifter.
One thing to keep in mind is that the petrol models take premium 98 fuel.
The older models had a 1/2 size MFD (multi function display) whereas the newer ones have a full size one.
This picture is from a Sportline

This is from a Pacific

From memory ESP (Electronic Stability Program) wasn't standard until 2008 either unless a safety pack was optioned... I need to check this but I'm sure I've seen a couple of 2005ish Golfs advertised as having a "Safety Pack". Until ESP became standard they only had plain traction control. I drove a 2007 Comfortline TDI (stands for Turbo Direct Injection, not Turbo DIesal) which only had ASR (Anti Slip Regulation aka plain old traction control).
Hope that helps a bit. It gets pretty confusing.
Sportline, Edition & Pacific are the ones that have body coloured handles etc.
Edition & Pacific models were introduced in 2008.
Edition kind of replaced the Trendline models and added a few things. The Edition is available with a 1.6L petrol engine or 1.9L turbo diesel. The petrol came with either a 6 speed tiptronic (regular automatic which can be shifted manually) or 5? speed manual. The diesel came with either the DSG (twin clutch "automatic") or 6 speed manual.
Pacific replaced Comfortline & Sportline. It has all the stuff like fog lights, sporty seats, dual zone automatic climate control, auto dimming mirror, auto lights + wipers etc. It was available with a 2.0L petrol engine or 2.0L turbo diesel. Like the Edition models the petrol was offered with a 6 speed tiptronic automatic or a 6 speed manual, the diesel was offered with a 6 speed DSG or 6 speed manual.
I don't know much about the older Trendline/Comfortline models to be honest because the Edition/Pacific models came out when I started getting into VWs.
The Trendline models have the black handles etc and don't have steering wheel controls... that's about all I know feature wise

The Comfortline has the black handles etc, auto lights + wipers, semi-automatic air con and it has steering wheel controls.
The Sportline added things like different alloys, fog lights, dual zone climate control and better seats etc over the Comfortline and of course the colour coded handles and bump strips on the front.
Cars are advertised as "tiptronic" instead of just "automatic" because it means they have a manual shift option either by using the gear shifter or with paddles on the steering wheel (note: the normal Golf models don't have paddle shifters).

This is my Golf's shifter. If you push it to the left when it's in Drive then it goes into tiptronic where you can shift manually by pushing/pulling the shifter.
One thing to keep in mind is that the petrol models take premium 98 fuel.
The older models had a 1/2 size MFD (multi function display) whereas the newer ones have a full size one.
This picture is from a Sportline

This is from a Pacific

From memory ESP (Electronic Stability Program) wasn't standard until 2008 either unless a safety pack was optioned... I need to check this but I'm sure I've seen a couple of 2005ish Golfs advertised as having a "Safety Pack". Until ESP became standard they only had plain traction control. I drove a 2007 Comfortline TDI (stands for Turbo Direct Injection, not Turbo DIesal) which only had ASR (Anti Slip Regulation aka plain old traction control).
Hope that helps a bit. It gets pretty confusing.
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