Mercedes no longer means Service and Reliability

Sadly, Mercedes no longer means Service and Reliability My C 250 cdi has been at Mercedes Bedford view for 4 months and counting after my car broke down on the side of the highway at 10:30 pm on the 4th of May. I was told this was due to parts failure with I suppose can happen, however subsequent to that there has been a part failure after part failure with the latest being an electronic component on the gearbox with no end in sight, the vehicle only has 110 000 km on the clock and just out of warranty. As far as service is concerned I have had very little service from my Service Adviser Jan and in desperation have spoken to the Service manager and workshop managers with little success. After 3 and a half months I was offered a loan car by Jan, I am still waiting for it! I see the new C series is advertised with over 6000 new parts, I am wondering if that is because the parts in the previous model keep failing. If this car was yours MR CEO of Mercedes what would you do, in frustration it seems I now need to turn to social media to try resolve a very poor reflection on the Brand.