In July our Mercedes Benz E350 (2011) 25,000 miles went for a service at an authorised dealership. this requires a transmission oil change. Upon driving home the car made a noise under acceleration. The car was returned and after investigation the dealership took responsibility stating the oil was contaminated and they would flush and re do.

This did not repair the car. Subsequently, the car had a transmission replaced. A noise was still heard and traced to a torque converter unit, it was replaced. After one replacement the issue becomes a parts warranty claim with MB UK.

It is now October and the car is going back tomorrow again. 400 miles were achieved this time before a noise within the transmission returned.

I have spoken many times to MBUK who have the worst customer service of any company I have ever used. They take notes give you a reference and say speak to the dealer.

The dealership are following warranty and quality processes by MB UK.

We have a car though since July which has spent more time away from us than with us. the dealer are supplying a car to use however they have proposed a discount of a new car (E Class).

The only reason have a broken Mercedes is because now, the faulty parts from MBUK. The work is free under warranty (Torque convertors and transmissions being replaced) however we cannot even sell or trade in the car elsewhere because it is not safe to do so.

We feel forced to accept the situation and trade it into the dealership and accept the discount off a new car.

However we feel this is forcing us to pay £23,000 for a new replacement when we had a perfectly good car before the service in July. They even want us to pay for new road tax, new delivery, licence transfer costs, we will need a to start a new service plan etc..

Any thoughts please?