Excess RPM = computer saves the day!
Thread Starter
Senior Member
Joined: Aug 2007
Posts: 271
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From: Richmond, VA
2013 C63 W204, 2016 E63S W212 Matte Gray
Excess RPM = computer saves the day!
Guys: for some reason, while on "S" transmission mode, when punching hard out of the gate, the car did not shift out of 2nd gear and reached 6,500 RPM. Instantly, I felt the RPM drop out (almost with a silent but felt "click"), and I regained composure. Apparently no damage, as I tested and ran for another hour, in all different levels of transmission configuration, assertiveness, speed, etc. 
The Owners Manual doesn't appear to discuss this, but would you agree that my experience was the computer automatically disallowing the Animal to go beyond the redline RPM?
Thank you in advance for your thoughts.
Kris
The Owners Manual doesn't appear to discuss this, but would you agree that my experience was the computer automatically disallowing the Animal to go beyond the redline RPM?
Thank you in advance for your thoughts.
Kris
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From: South Carolina
2005 E55 ///AMG
The owner's manual does indeed discuss that the computer will not allow you to go beyond the redline in S mode. However, in M mode it does give you a warning to not let your car go beyond the redline which would make me think you can do it in M mode.
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From: S.D Cali
CLS63
Put your car in m mode, 1st gear and your car will not let you go past the rev limiter. It will just cut out. In s mode it should shift it's self into the next gear without hitting the rev limiter.
Thread Starter
Senior Member
Joined: Aug 2007
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From: Richmond, VA
2013 C63 W204, 2016 E63S W212 Matte Gray
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From: San Jose, CA
2007 E63 w/P30 and Eurotech CF Diffuser
The rev limiter is VERY aggressive. I have never hit it in S, which is the fastest way off the line. I have hit it in M a number of times. When it engages it feels like a brick wall. You can never time a 1st to 2nd shift in M and beat what the car can do in S.
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From: S.D Cali
CLS63
but with ESP off and m mode on, the car will scream like a .. lol
Thread Starter
Senior Member
Joined: Aug 2007
Posts: 271
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From: Richmond, VA
2013 C63 W204, 2016 E63S W212 Matte Gray
Thanks again
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From: California, USA
E63 P30, CL500 Sport
Not only will the car not reach the rev limiter in S mode, during your first 3 to 4 WOT runs, the car may actually shift a little bit early because it was adapted to "everyday-driving" mode. But after your 3 to 4 aggressive full throttle runs, the transmission will optomize shift points to be right at redline for maximum power 
Last edited by MB_Forever; Jan 7, 2008 at 12:37 AM.
Newbie
Joined: Jun 2008
Posts: 12
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2004 E55
I was gunning up the on ramp to freeway the other day in what I thought was S mode, but I was actually in M mode. The engine revved very high then felt like it lost power (felt like the rev limiter) then I think it self-shifted to the next gear. The owner's manual says that the transmission will not self-shift in M mode and that over-revving damage to the engine will result if gears not changed in time.
The question is: did the rev limiter protect my engine and did the transmission self-shift to the next higher gear? Or could I have damaged my engine?
It might be my imagination, but it feels like the car is not as fast as before the incident. I am under a 3 year CPO warranty, but if I did damage the engine, how could I tell without taking it to the dealer?
Thank you for any replies.
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Joined: Jul 2007
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From: SoCal
a car that gets very poor gas mileage.
Hello, total newbe here. Read owner's manual and found slightly contradictory info, so joined MBWorld this a.m. and did some searching. So far, this is the closest thread pertaining to my question I have found.
I was gunning up the on ramp to freeway the other day in what I thought was S mode, but I was actually in M mode. The engine revved very high then felt like it lost power (felt like the rev limiter) then I think it self-shifted to the next gear. The owner's manual says that the transmission will not self-shift in M mode and that over-revving damage to the engine will result if gears not changed in time.
The question is: did the rev limiter protect my engine and did the transmission self-shift to the next higher gear? Or could I have damaged my engine?
It might be my imagination, but it feels like the car is not as fast as before the incident. I am under a 3 year CPO warranty, but if I did damage the engine, how could I tell without taking it to the dealer?
Thank you for any replies.
I was gunning up the on ramp to freeway the other day in what I thought was S mode, but I was actually in M mode. The engine revved very high then felt like it lost power (felt like the rev limiter) then I think it self-shifted to the next gear. The owner's manual says that the transmission will not self-shift in M mode and that over-revving damage to the engine will result if gears not changed in time.
The question is: did the rev limiter protect my engine and did the transmission self-shift to the next higher gear? Or could I have damaged my engine?
It might be my imagination, but it feels like the car is not as fast as before the incident. I am under a 3 year CPO warranty, but if I did damage the engine, how could I tell without taking it to the dealer?
Thank you for any replies.
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Joined: Jun 2006
Posts: 6,649
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'03 E55, Range Rover Sport Supercharged, Ducati 748R
my car will ALWAYS self shift, even in "m" mode if i'm not fast enough. i didn't like this at first but after consideration i realized that it's better than missing (being late for) the shift and hitting the rev limiter.
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From: Florida
99 Acura 3.2TL-P 6MT
Not only will the car not reach the rev limiter in S mode, during your first 3 to 4 WOT runs, the car may actually shift a little bit early because it was adapted to "everyday-driving" mode. But after your 3 to 4 aggressive full throttle runs, the transmission will optomize shift points to be right at redline for maximum power
Super Member
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From: SoCal
a car that gets very poor gas mileage.
One of the many things I love about this car and engine is that it can be driven in a comfortable/leisurely way or driven in an extreme/sporty way. If you like to drive in Automatic, "C" mode takes care of the former while "S" mode should take care of the latter. But it doesn't. At least, not the way I would like it to.
The way I drive, I like to hold the RPM's at about 3,600 - 3,800 when cruising. C mode will not do this. I've discovered that S mode also will not do this...because of stop-n-go traffic, my speed will vary and shift points will need to vary as well. Hence, I drive in "M" mode 99% of the time.
Personally, I hate this "adaptive" TCU system.
Sorry to go off topic...we now return to the feature presentation. There will be no further interruptions.
The way I drive, I like to hold the RPM's at about 3,600 - 3,800 when cruising. C mode will not do this. I've discovered that S mode also will not do this...because of stop-n-go traffic, my speed will vary and shift points will need to vary as well. Hence, I drive in "M" mode 99% of the time.
Personally, I hate this "adaptive" TCU system.
Sorry to go off topic...we now return to the feature presentation. There will be no further interruptions.
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From: Bay Area, CA
E55
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From: Phoenix
E55
I I switch to "M" mode (via the button on the center console) then there is no shift unless I do so via the paddles or shifter...just the redline bounce. I wonder if this changed from 03 to 05?
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'03 E55, Range Rover Sport Supercharged, Ducati 748R
If I am in "S" mode I can shift manually with the paddles. The tranny will auto shift at redline, but I can hold any gear at any point shy of redline.
I I switch to "M" mode (via the button on the center console) then there is no shift unless I do so via the paddles or shifter...just the redline bounce. I wonder if this changed from 03 to 05?
I I switch to "M" mode (via the button on the center console) then there is no shift unless I do so via the paddles or shifter...just the redline bounce. I wonder if this changed from 03 to 05?
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Joined: Jul 2005
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From: London, UK
No longer stock '06 E55, A3 3.2 Quattro, GLE 400d, R107 280SL, Golf Polo
I've on a couple of occasions managed to beat the tranny to redline/limiter in S mode. Not sure how but mbe tranny was asleep or needed a sneaky reset.
Manual will have u bumping limiter... that does not do the car any good at all...
Manual will have u bumping limiter... that does not do the car any good at all...
