Differences between a 12 & 24k service ?

[roshambo]

Can anyone tell me what more gets done to the car at a 24k service over a 12k service ?
There is a huge difference in price so curious.

Cheers

Ro.

[turboguru]

it depends on how many miles you do in the car, it should be a 12k one then a 24k one in the 996 TT like yours.

[turboguru]

sorry misread your mail, if you look in your service book it will tell you what is done at each service

[james_j]

On my 993, the main additional stuff I can recall done at 24,000 are plugs and the second oil filter.

[roshambo]

Thanks guys, yup plugs looks like the main big difference.
I ask because my car has only done 18k miles in nearly 3 years, so I guess the plugs don't need doing just yet ??