red line
11-09-2006, 06:02 AM
#1
Senior Member
Thread Starter
Join Date: Jul 2006
Location: cairo, egypt
Posts: 383
Likes: 0
Received 0 Likes
on
0 Posts
cls 55 amg, clk 320
red line
i have a stock cls 55, its done 4000 miles,and according to the owners manual, the maximum revs are 6100 rpm before the red line. when i'm pushing the car it goes to at least 6500 rpm, and the tranmission becomes stiff and dosent upshift when i manually try to do so (delayed upshifts). Obvioualy a want to avoid engine damage, my question is it normal for the gearbox to shift like that ?
otherwise i have to take my foot off the throttle to avoid reving it to its maximum so the car would smoothly upshift.
any advise would be deeply appreciated.
otherwise i have to take my foot off the throttle to avoid reving it to its maximum so the car would smoothly upshift.
any advise would be deeply appreciated.
Last edited by hatem; 11-09-2006 at 06:36 AM.
11-14-2006, 06:21 AM
#3
MBWorld Fanatic!
Join Date: Oct 2005
Location: mymbonline
Posts: 4,276
Likes: 0
Received 0 Likes
on
0 Posts
mymbonline
your car is ok, there is no prob with it.
the transmission is just slow to respond in manual mode, for example if you upshift (press the button) at 6100 it will switch gears 300 rpm (or so) later, it takes the trans. ecu time to figure out if your request is possible/safe.
as for the engine reving past redline, thats normal also, there is redline and then (usually a few hundred revs later) there is fuel cutout (rev limiter). for max performance in most cars its better to shift as close to the rev limiter (w/o actually hitting it) as possible.
here is a vid of me driving my moms e55 in Manual mode, i press the button at about 6100-6200 and you can see when the gear change actually occurs, as speed increases you can shift later in the rev ranfe b/c it takes longer for the engine to rev b/c the car isnt accelerating as fast, practice and youll get it down
http://www.youtube.com/watch?v=AvsNn-26d-s
the transmission is just slow to respond in manual mode, for example if you upshift (press the button) at 6100 it will switch gears 300 rpm (or so) later, it takes the trans. ecu time to figure out if your request is possible/safe.
as for the engine reving past redline, thats normal also, there is redline and then (usually a few hundred revs later) there is fuel cutout (rev limiter). for max performance in most cars its better to shift as close to the rev limiter (w/o actually hitting it) as possible.
here is a vid of me driving my moms e55 in Manual mode, i press the button at about 6100-6200 and you can see when the gear change actually occurs, as speed increases you can shift later in the rev ranfe b/c it takes longer for the engine to rev b/c the car isnt accelerating as fast, practice and youll get it down
http://www.youtube.com/watch?v=AvsNn-26d-s
11-14-2006, 07:20 AM
#4
Senior Member
Thread Starter
Join Date: Jul 2006
Location: cairo, egypt
Posts: 383
Likes: 0
Received 0 Likes
on
0 Posts
cls 55 amg, clk 320
thank you for the feedback AMG_55.
so that means its ok then to go past 6100 to 6500 without causing engine damage.
btw how fast did you go with that car?
so that means its ok then to go past 6100 to 6500 without causing engine damage.
btw how fast did you go with that car?
11-14-2006, 03:34 PM
#5
MBWorld Fanatic!
Join Date: Oct 2005
Location: mymbonline
Posts: 4,276
Likes: 0
Received 0 Likes
on
0 Posts
mymbonline
yes its ok, i doubt anyone does/did it more than i did in my clk55 (6700 cutout), the engine was fine.
i hit 158 before the limiter stopped me
