I have a CLA220 which is about 4.5years old now. In June, my turbo blew while on a long distance trip. This was replaced. Ever since then, my engine light has been coming on. I've lost count of the number of times I've been to the dealership. They changed multiple parts (in certain instances, the same part multiple times). After every "fix", my engine light still comes on a few days later. The most recent fix was for a part that had to be ordered from Germany. The cost was over R20, 000 but the engine still came on a few days later. I feel like the car needs to be looked at by a more senior mechanic. However, Mercedes still insists that it needs to be booked into a dealership. I've been back & forth to the dealership for 6 months and they haven't been able to successfully diagnose the problem. I am not sure how to escalate this further.