Matth3w

1) my wife has a 2012 C250 sedan. She'd like to not have to turn sport mode on every time. Is this possible?

2) is it really not possible to keep the digital speedo up while being able to change tracks with the steering controls??? This seems like a ridiculous oversight IMO.

victort

1. not possible
2. not possible

Domm

Maybe with STAR? I prefer the digital speedo as well, but it's only a minor inconvenience pressing a button.

_Bondo_

E is better anyway.

mikefili

Why better? I have noticed a big difference in S as compared to E. it holds each gear longer and at a higher rpm. Every Benz I have had felt like the button made no change. My wife's 08 C would stay in S forever if you did not change it, although it did not make much of a difference.

_Bondo_

In E mode, the car will stay lower in the RPM range, and provide you with gobs of torque and down-low grunt. Sport mode is of course the choice if you are driving in winding hills, etc, but for freeway and typical cruising I prefer E. In my experience, S mode will drop the car not one but two gears when you hit the gas, and on this engine/turbo setup (as is the same with many factory turbo setups) the turbo loses a lot of its gusto at 5,000 rpm.

I had an Eagle Talon that was the same way from the factory. With a boost gauge on and bumping the boost to 15psi, it would hold to 5k and then just fall flat on its face. The intent of a factory turbo is to cheaply and realiably provide quick, usable boost. Unfortunately that means it runs out of breath in the higher rpm ranges, where most 4-cylinder engines really start to sing.

mikefili

I see,that makes a lot of sense. Tonight I drove my wife's GLK 350, I really forgot how great that engine really is, tons of torque from the lowest rpm, her prior C300 was equally as sommth and powerful, I think the turbo motor was not the best choice for my new C250,
Not at all smooth and powerful, makes me really miss the 6 cyl, if I could turn the clock back a few weeks I would have the 350 instead of the 250.