Maintenance costs for C4 – how expensive? Hello, first of all a strong hello to the forum I’ve been a proud owner of a C4 HDI 110 for 2 weeks and am thrilled. Just a great car! So, my first inspection is in front of me (which is still free of charge) and I wanted to ask what the next maintenance will cost on average. Due to my driving performance >40Tkm a year, I as well as at least once a year will be allowed to visit the friendly one. d is worth a warranty extension including maintenance cost acceptance? How useful is it to buy the warranty extension. I am a little undecided. Thank you and greeting Martin