Hi, Mercedes Benz E Class is OBD II compliant ... any car which is On Board Diagnostics (OBD) II compliant, equipped with the OBD II connector which is located within three feet of the driver (under the dash and behind the ashtrays)...
Our estimation was for general servicing and engine oil replacement, but your quotation shows that there is a lot work will be done. We will advise you to confirm the labor charge from Mercedes-Benz customer care, rest of the quotation seems fine.
Yes you would be getting option of heater but not heating seats. Thank you. To know more details of the car, please do follow the site: http://www.cardekho.com/carmodels/Mercedes-Benz/Mercedes-Benz_E-Class