I think when you buy a Merc you are buying more than a car you are buying into the Marque. My wife was told the mech needed stripping down and may need a new 'Control unit'
My wife challenged the Service Manager and was told that they would have picked it up before stripping the mech down.
Not sure I can give them the benefit of the doubt.
I am looking for a new motor, considering a Bentley Continental, Jaguar XKR, Mercedes E63. This type of thing does not help with customer relations!!
Your attitude is far more likely to result in more sales.
Wish You Were Here.