They'll all turn to st when caught in traffic it's the way it goes, get a newer C220/250 & roll with it, when I use the car to drive into central london it's the same thing.
Also don't be fooled into getting a Hybrid as they'll be worse than your diesel.
t when caught in traffic it's the way it goes, get a newer C220/250 & roll with it, when I use the car to drive into central london it's the same thing.