CL9 Poor fuel economy

[duzy]

no point asking if auto or manual
no point asking if it has std ecu

he has had the car since new, going for 8L to 12L per 100km.

try cleaning ur injectors, change ur fuel pump. otherwise yeah, my car was going 12L per 100km aswell, now its gone back down to 10.5

[shmivic]

no point asking if auto or manual
no point asking if it has std ecu

he has had the car since new, going for 8L to 12L per 100km.

try cleaning ur injectors, change ur fuel pump. otherwise yeah, my car was going 12L per 100km aswell, now its gone back down to 10.5

asking because auto and manual gearboxes produce different internal loads.
increased load = decreased fuel economy.

agree could be injectors, but there a stab in the dark on a newish car and doubt they would be failing already. Your car isnt misfiring is it?

prefferable to try basic tune methods before getting drastic and changing everything straight away.

whats the weather like in your city at the moment?