Negative experience with Mercedes

[Craiglxviii]

and let them diagnose again would be my recommendation

Too ****** right

 

[SteveCa]

Can you say which one?

Can you say which one?

Autoclass Milton Keynes.

 

[Craiglxviii]

Autoclass Milton Keynes.

I’ve never used them but they have an excellent reputation. Fingers crossed for you.

 

[SteveCa]

I’ve never used them but they have an excellent reputation. Fingers crossed for you.

Thank you. I will report back on here when I have got it back.

​

 

[SteveCa]

Got the car back. After looking at engine replacements including Crewe Engines & Ivor Searle of Soham decides to buy a genuine Mercedes remanufactured engine. Not cheap. This has a two year unlimited mileage warranty. Autoclass of Milton Keynes ordered & fitted it. They did a perfect job and were cheaper than Mercedes Oxford so would highly recommend them if you do not want to use a main dealer. They confirmed the injector had jammed open flooding one of the piston chambers which in turn melted the injector, damaged the piston, and wrecked the engine. No logic as to why it did but it did not have the dodgy early injectors fitted to the 2010/2013 cars.

 

[SL63 Mark]

Glad you got it fixed, so overfuelling in one cylinder caused the damage ? This is rare, and news to me as an owner of multiple diesel cars. I would be interested to understand the actual mechanism of failure, if someone could explain

 

[star]

Glad you got it fixed, so overfuelling in one cylinder caused the damage ? This is rare, and news to me as an owner of multiple diesel cars. I would be interested to understand the actual mechanism of failure, if someone could explain

Ditto, still can’t understand how a small hard acceleration “melts” a piston. We see lots of overfuelling diesel cars, from very loud injector bark to smoking on long idle, never seen a melted piston.

 

[SteveCa]

The only people that might be able to explain it would be Mercedes as they will be getting the engine back. But I somehow doubt they will reveal the reason. It's just a very expensive one off. It has been suggested that the very low mileage the car had done before I bought it (24k) in 8 years may have been the reason as diesel injectors can jam open or closed if under used?? Autoclass said they had a BMW do the same thing. I will never know but won't be buying another diesel or Merc.