Deficiencies in Espace JK

I bought an Espace JK 2,0 Turbo (leasing back runner) BJ 11/02 a year ago. The car was not quite 4 years old, had 52000 km on the beautiful digital display, a brand new engine (900 km) and new brakes. I thought nothing could happen. FALSE! The following defects occurred on 10000 km: 1. immobilizer defective……………………… Costs incl. towing approx. 800 € 2. display defective. ………. ……….costs approx. 750 € …..Renault reimburses 300 € to Kulanz 3. Keycard defective…………………………….cost 180 € ………….was determined 4. Card reader defective……….costs would be approx.200 €, will not be exchanged, since the box still starts 5. Tray joint on the front axle over ………cost approx.100 € 6. Oil pipe to turbo leaks……….cost approx.250 €, warranty rejected despite the 11 months ago built engines with only 10000 ……………………………………………km mileage, Renault offers 100 € refund on culant, who has similar problems with Renault, respectively Espace? How is Renault i.S. culant/guarantee performance? When the box is running it is really fun and is super comfortable, nevertheless I think about a sale. Greetings from the Allgäu Claus