Switching C/S while driving

C300Man · 10-07-2008, 07:54 AM

Yesterday I was driving and my g/f accidently pressed the C/S while I was in drive. Will that hurt my car.

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UGOTMOPPED · 10-07-2008, 08:51 AM

NO....

lx Raven xl · 10-07-2008, 09:01 AM

Quote:

Originally Posted by C300Man

Yesterday I was driving and my g/f accidently pressed the C/S while I was in drive. Will that hurt my car.

You can do that. Its not a problem.

piccirm · 10-07-2008, 09:40 AM

According to what I was told, it is just a software change to go from 7 speed to 6 speed transmission.

Blk04cobra1 · 10-07-2008, 09:51 AM

no worries...tell her to push it as many times as she would like

lx Raven xl · 10-07-2008, 10:03 AM

Quote:

Originally Posted by piccirm

According to what I was told, it is just a software change to go from 7 speed to 6 speed transmission.

No , What it actually does it changes the gears in high RPM if you are in S ( sports mode ) in C mode the gear change will happen a bit sooner.

Chaz00Blue · 10-07-2008, 10:52 AM

C mode also starts the car out in 2nd gear to give you more traction in low traction situations.

Maximo · 10-08-2008, 10:59 AM

trust me! no hurt at all

woolala · 10-12-2008, 12:01 AM

OMG!!! tell her dont touch that button again!!! hurts the car alot!!!!!

jk!!! ^.<
doesnt hurt @ all~!!

dimaSG · 10-12-2008, 04:10 AM

i also heard it will stiffen the suspension (when changed to S), true?

akbro93704 · 10-12-2008, 04:46 AM

Quote:

Originally Posted by dimaSG

i also heard it will stiffen the suspension (when changed to S), true?

Not on the US C's, its part of the agility package in other countries.

micropower99 · 10-12-2008, 04:48 AM

Says in the manual not to change while in motion but it won't mess up your car. Why else would they make the button active while in motion?

tanktube67 · 10-12-2008, 12:53 PM

micropower99 · 10-12-2008, 03:09 PM

Quote:

Originally Posted by tanktube67

Is that directed towards my post?

Glyn M Ruck · 10-13-2008, 03:47 PM

It won't hurt the car if you change in motion. Benz recommend against it because the car could go into a skid or whatever in poor road conditions or it could startle the driver & cause an accident.

Devastator187 · 10-13-2008, 05:22 PM

Quote:

Originally Posted by Blk04cobra1

no worries...tell her to push it as many times as she would like

ghettobird · 10-13-2008, 09:48 PM

Quote:

Originally Posted by Chaz00Blue

C mode also starts the car out in 2nd gear to give you more traction in low traction situations.

So is it safe to say that it is better to launch from C rather than S for better traction?

white46 · 10-13-2008, 09:55 PM

Quote:

Originally Posted by ghettobird

So is it safe to say that it is better to launch from C rather than S for better traction?

depends on surface condition.
under low traction (ie.snow), there will be less wheel spin in C.

C300PO · 11-30-2008, 04:26 AM

I went from C to S on the highway tonight traveling at about 70mph just to see what would happen if anything...seemed like it went from 7th gear to 6th as the engine gained about 200 more RPM... definitely felt it and watched it on the tach...

VD$ · 11-30-2008, 06:15 AM

C/S will adjust TCU software settings and will "force" TCU to use lower gear at higher PRMs. TCU is smart enough to pick the right one and there is no way to break the system.

Diesel Benz · 11-30-2008, 07:16 AM

Quote:

Originally Posted by micropower99

Says in the manual not to change while in motion but it won't mess up your car. Why else would they make the button active while in motion?

Yes, I've seen this mention in the W221 manual too (not sure if I was reading the Euro manual or a US pdf copy). The only reason I can think of why the manual states this is that the possible change of gear could make the car start a slide at extremely slippery conditions (absolutely theoretical case still).

Cannot be anything related to hurting the tranny or such.

C300Sport · 11-30-2008, 09:12 AM

Quote:

Originally Posted by Diesel Benz

Yes, I've seen this mention in the W221 manual too (not sure if I was reading the Euro manual or a US pdf copy). The only reason I can think of why the manual states this is that the possible change of gear could make the car start a slide at extremely slippery conditions (absolutely theoretical case still).

Cannot be anything related to hurting the tranny or such.

I have been playing with this all week on my loaners....it only controls the shift algorithms and does not hurt the car at all to shift back and forth. I agree with Diesel Benz that MB only puts the warning there to cover their @$$ in case someone presses it, gets a lower gear, breaks traction for a sec, and subsequently spins into the bushes...then they can sit back and say "told you not to"

mat2hu · 04-08-2009, 11:20 PM

the cool thing about S mode is that when u accelerate and slow down, it keeps your RPM around 3500-4000 so it gives you your full torque and almost all of your horsepower ready at any given moment so when you push the gas the car flies. The S mode also does stiffen up the suspension, trust me I feel it! braking is also improved in S mode because it downshifts quicker and keeps the car in higher rpms under braking so it uses more engine braking hp to slow down the car. S mode feels much better than regular, but it comes at a price(your MPG).

Krytech · 04-08-2009, 11:26 PM

Quote:

Originally Posted by mat2hu

The S mode also does stiffen up the suspension, trust me I feel it!

Not our US models. MBUSA hates America.

eyemd · 04-09-2009, 12:15 AM

Quote:

Originally Posted by mat2hu

the cool thing about S mode is that when u accelerate and slow down, it keeps your RPM around 3500-4000 so it gives you your full torque and almost all of your horsepower ready at any given moment so when you push the gas the car flies. The S mode also does stiffen up the suspension, trust me I feel it! braking is also improved in S mode because it downshifts quicker and keeps the car in higher rpms under braking so it uses more engine braking hp to slow down the car. S mode feels much better than regular, but it comes at a price(your MPG).

S mode is definitely a more aggressive shifting algorithm, but I actually wish it was even more aggressive sometimes. MB should have designed 3 shift modes...or I should by another car with a stick

10-07-2008, 08:51 AM	#2
UGOTMOPPED Super Member Garage is empty, add now Join Date: Sep 2007 Location: NEW YORK Posts: 521 Drives: 11' R8 - 11' RR Sport	NO.... __________________ 2013 Mercedes SL63AMG - POSSIBLY 2013 Audi RS5 - incoming 2013 Audi S6 2012 Audi R8 V10 - Tubi/APR/MaCarbon + more! 2012 Audi A7 - SOLD 2011 Audi R8 V8 w Tubi/ADV1 - SOLD 2011 Range Rover Sport - SOLD 2010 BMW X5M - 22" HRE's - SOLD 2009 C63 - Kleeman/KW/HRE - SOLD

10-07-2008, 10:52 AM	#7
Chaz00Blue Member Garage is empty, add now Join Date: Sep 2007 Location: North Carolina Posts: 165 Drives: 2008 C-350 Palladium Silver and MM.	C mode also starts the car out in 2nd gear to give you more traction in low traction situations. __________________ Second place is just first loser.

10-12-2008, 12:01 AM	#9
woolala Junior Member Garage is empty, add now Join Date: Jul 2008 Location: San Francisco Posts: 55 Drives: 2007 SLK350	OMG!!! tell her dont touch that button again!!! hurts the car alot!!!!! jk!!! ^.< doesnt hurt @ all~!! __________________ <BR><BR> in memory of Charlie Brown <BR> always my ♥ i miss u ~ may 26, 2008 - april 30, 2010 <BR><BR><BR> 2007 SLK350 2008 C300 totaled

10-12-2008, 04:48 AM	#12
micropower99 MBWorld Fanatic! Garage is empty, add now Join Date: Dec 2007 Location: Vancouver, BC Posts: 2,052 Drives: 2008 Mercedes C300 4Matic	Says in the manual not to change while in motion but it won't mess up your car. Why else would they make the button active while in motion? __________________ 2008 C300 4Matic Current Mods/Changes: CF Spoiler, LED Eyelids, PIAA Xtreme White Plus 4000K Fogs, 6000K HID Headlight Bulbs, Debadged Trunk, 28% Tint, AMG Quad Exhaust, Removed Side Chrome, Black Painted Front Grill, Black Luxury Gear Shifter, AMG Valve Stem Caps, Clear Corners, CF Mirror Covers, C63 CF Diffuser, Backup Camera, Custom Floor Mats, CF Front Lip, Tinted Taillights, MBarts Strut Bar

10-12-2008, 12:53 PM	#13
tanktube67 MBWorld Fanatic! Garage is empty, add now Join Date: Nov 2007 Location: SFV CA Posts: 4,424 Drives: 2008 Black Out C350 Saks Edition / 87 VW GTI	__________________ . Powerchip ECU tune K&N Filters Black Out window & trunk molding/ by JS Design Factory Black Out side marker lamps Black Out Grill Tint tail lights "cherry red" C63 OEM wheels on Pzero tires 35% window tint H&R Spring Euroteck CF front lip DDM 6000K HID kit Custom quad exhaust by Royal Mufflers http://www.mbworld.org/forums/c-clas...quad-tips.html

10-07-2008, 09:40 AM	#4
piccirm Junior Member Garage is empty, add now Join Date: Jul 2008 Location: Cary, NC Posts: 63 Drives: 08 C350 Artic white, MM, PII, 18 AMG, Ipod	According to what I was told, it is just a software change to go from 7 speed to 6 speed transmission.

10-07-2008, 09:51 AM	#5
Blk04cobra1 MBWorld Fanatic! Garage is empty, add now Join Date: Mar 2007 Location: Charlotte, NC Posts: 1,063 Drives: 2002 S430, 2004 Cobra, 2004 Tahoe	no worries...tell her to push it as many times as she would like

10-08-2008, 10:59 AM	#8
Maximo Newbie Garage is empty, add now Join Date: Oct 2008 Posts: 7 Drives: C-2008	trust me! no hurt at all

10-12-2008, 04:10 AM	#10
dimaSG Newbie Garage is empty, add now Join Date: Nov 2007 Posts: 10 Drives: '09 SLK 350	i also heard it will stiffen the suspension (when changed to S), true?

10-13-2008, 03:47 PM	#15
Glyn M Ruck Super Moderator 1965 Jaguar 3.8 S Type Join Date: Jun 2008 Location: Llandudno, Cape Town, South Africa Posts: 15,859 Drives: late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires	It won't hurt the car if you change in motion. Benz recommend against it because the car could go into a skid or whatever in poor road conditions or it could startle the driver & cause an accident.

11-30-2008, 04:26 AM	#19
C300PO Member Garage is empty, add now Join Date: Nov 2008 Location: North San Diego Coastal Posts: 110 Drives: C300 Sport	I went from C to S on the highway tonight traveling at about 70mph just to see what would happen if anything...seemed like it went from 7th gear to 6th as the engine gained about 200 more RPM... definitely felt it and watched it on the tach... Last edited by C300PO; 11-30-2008 at 04:49 AM.

11-30-2008, 06:15 AM	#20
VD$ Junior Member Garage is empty, add now Join Date: Jan 2005 Location: Fairfield County, Connecticut Posts: 47 Drives: E350W4	C/S will adjust TCU software settings and will "force" TCU to use lower gear at higher PRMs. TCU is smart enough to pick the right one and there is no way to break the system. __________________ Plot, Plan & Play - http://www.tabUp.com

04-08-2009, 11:20 PM	#23
mat2hu Senior Member Garage is empty, add now Join Date: Jan 2009 Location: SoCal Posts: 291 Drives: C350	the cool thing about S mode is that when u accelerate and slow down, it keeps your RPM around 3500-4000 so it gives you your full torque and almost all of your horsepower ready at any given moment so when you push the gas the car flies. The S mode also does stiffen up the suspension, trust me I feel it! braking is also improved in S mode because it downshifts quicker and keeps the car in higher rpms under braking so it uses more engine braking hp to slow down the car. S mode feels much better than regular, but it comes at a price(your MPG).

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