Please advice ... I am looking to purchase a used (max 3 years old) E320 CDI or E320 (petrol) but undecided which one to go and also which trim e.g. Sport or Avantgarde. I realise that the Sport trim comes with 18" wheels, steering wheel paddle shift and sports exhaust which can be quite nice. Just wonder how economical (in real life) the CDI compares to the petrol version and are there are known issues that I need to ne be aware of. I currently own a 10 years old E240 and its great together with my previously owned S600, 190E 2.6 and E230.