I dropped my wife off at the airport this morning in her ML320 CDI and on the return journey my intrinsic curiosity got the better of me and felt I had to find out what sort of economy I could get from a now fully run in 4x4.
I’m no ‘hypermiler’ so my speed was only limited by traffic...
Well I have tried the Carlsson Eco (3 versions) and now the Carlsson Power which all failed to do any thing at all. Apparantly mine must be one of the 4% of cars their product doesn't like ?! Shame as they were very plug and play - straight onto the ECU and apparanly do not mess with fuel rail...
just wondering if anyone's tried one of these,, do they work,, ?? you fit it between the brake servo & the inlet manifold,, so i've read,, supposed to increase your mpg,,