2009 CLK550 - Differences between C (Comfort) and S (Sports) mode?
If you hold the gearstick 1-2sec on - it will shift down to the lowest gear possible.
So, the shifter +- option augments the paddle shifters or acts in the same way, but using the shifter to change gear..?
Sorry to be so dim.

Where are you from?

God Jul!
+ & - , u mean Tiptronic Or Touch-Shift!for ur car, u have the 7 speed gearbox... (tones of threads here to read about that)
do a google search on Tiptronic & u'll get tones of stuff online.. this is implemented in gearboxes since 2000/2001 (assuming).
it means shifting Up(+) or Down(-) gears without the use of a clutch
(example below is on 5 speed gearbox)
if u r in Drive "D" > Shift Down > 4 > 3 > 2 > 1
Up Shifting is the reverse of Down Shifting

For instance, u r going down a hill and u need to set a bigger gear, Ur in D mode & need to go to 2nd Gear, all u need to do is
* Keep Pressing the Shifter to the right side (-) till u get "2" on ur cluster screen (near ur ODO meter)
Dont worry about hurting ur gearbox/engine, for safety reason if u forgot ur in 1st gear & accelerated to the red line & forgot to change, the car would change for u.. just so u don't end up with a burned transmission or engine at the end of the day.
so it like driving a manual without the clutch and just nudging the stick either left or right for changing gears...

what did u use to drive before ur Merc? was it a manual or a normal auto?
The Best of Mercedes & AMG
+ & - , u mean Tiptronic Or Touch-Shift!for ur car, u have the 7 speed gearbox... (tones of threads here to read about that)
do a google search on Tiptronic & u'll get tones of stuff online.. this is implemented in gearboxes since 2000/2001 (assuming).
it means shifting Up(+) or Down(-) gears without the use of a clutch
(example below is on 5 speed gearbox)
if u r in Drive "D" > Shift Down > 4 > 3 > 2 > 1
Up Shifting is the reverse of Down Shifting

For instance, u r going down a hill and u need to set a bigger gear, Ur in D mode & need to go to 2nd Gear, all u need to do is
* Keep Pressing the Shifter to the right side (-) till u get "2" on ur cluster screen (near ur ODO meter)
Dont worry about hurting ur gearbox/engine, for safety reason if u forgot ur in 1st gear & accelerated to the red line & forgot to change, the car would change for u.. just so u don't end up with a burned transmission or engine at the end of the day.
so it like driving a manual without the clutch and just nudging the stick either left or right for changing gears...

what did u use to drive before ur Merc? was it a manual or a normal auto?
I had an Infiniti before and it had the clutchless shift using the stick.
With my 550, the presence of the paddles complicated my thinking.
well make sure to know how to turn "On" dyno mode & that would give a new experience to ur tiptronic driving .... Good Luck

When Dyno Mode is On, ESP & ABS is turned off.. that is why u would see your instrument cluster lighting up with different warning signals... Dyno Mode would give u the edge of leaving a green light with a trail of rubber behind u & unleashing the drift 550 monster.
just make sure to turn the Dyno Mode OFF when u go for an inspection at the dealer so that the car would go back to normal... i guess they cant know if ur playing with that option ...
nevertheless, be carefull when u r in Dyno mode, the car has no safety features on... so dont go Dyno mode on the highway doing 140 Miles per hour and trying to curve a 45 degree angle corner! that wouldn't end up in a fun way

Dyno Mode On:
- Make sure you have the default screen cluster showing ur temp or Speed as a start.
- put ur ignition key & turn one click only (u will get the srs and brake light on i guess only)
- directly press 3 times consecutively the "R" stick (located to ur right of the instrument cluster).
- The cluster would show the Battery Voltage
- scroll down & u would see the Dyno Mode.
Good LucK!
I am past the "crazy" part of my life..!
It comes to us all, one day

From the 722.9 technical training manual:
S (Sport) first gear start
C (Comfort) or E (Economy) second gear start, earlier upshifts and later down shifts. Auto default to E on Blue Efficiency models.
Note: Transmission will start in first gear if any of the following apply.
1st gear manually selected.
3/4 to full throttle applied from stationery start.
Engine cold (catalytic converter warm up)
Now - to precis the following: Certain high torque diesel models will pull away in first gear in both modes to protect the torque converter.


Mercedes are not going to willingly pick up the bill for someone wantonly trashing the vehicle.
Plus = Shift up to normal, where the transmission would be at the current speed [before it was monkeyed with
]
Plus = Shift up to normal, where the transmission would be at the current speed [before it was monkeyed with
]is there a limited to prevent inadvertent gear selection that could be catastrophic..?
All automatics, as far back as my memory serves, have this limiter designed in as a safety measure. So, even if you shift down into 2nd at 90mph, the tranny will refuse to obey until a safe speed range met. By the same token, later autos wil not shift up until the road speed meets the designed-in specs. A similar safety device is 'built' into the Cruise Control wherein it will not connect until, say 25 mph - also wired into the rear brake-lamps switch.


