Yep -extend!
My c1 200 had £2500 of warranty claims in it's first 2 years ....
But would have been covered under the original manufacturers warranty - not extended.
Me, I chose not to because of the need to have the services carried out by the dealer network. If it were not for this requirement I would pay for it.
I do about 15-18k a year which is a lot of cash when the routine servicing is not that difficult.