flushing

Hi I purchase an 11 plate E200 SE CGI Blue-efficiency Convertible (Auto) 4 months ago from a dealer as approved used. I was told it was fully serviced, although not shown records as they are held centrally on MB's computer (practice I don't agree with as it's just an attempt to tie you to a...

Morning all!... I have never been a fan of any kind of flushing or cleaning fuel addatives in old engines as certain deposits can actually be helping plug any nooks and crannys that have developed with age. My question is, with this new Shell Fuel, could I loosen these positive deposits...