Guarantee and scalded services

Dear everyone, has someone already dealt with the issue of warranty or/and warranty extension? After we have only 2 years the extension possibility exists up to (in total 96 months), but what is really involved with it? If I look at the variant 1 (simple warranty extension), here are actually all the relevant things, such as the batteries (by the way I forgot to mention – I drive a 4×4 E-Tenese), or also the headlights not included. if I think that only one of the engines of our headlights breaks (and here I am not talking about rockfall) and we will have to change the complete headlights that will probably go into the money …. I have a few months to decide here whether the extension really makes sense, because at least over € 7,000,- for 96 months with one-time payment and if then nothing is covered …. I would be interested in your considerations and experiences about this Here!