gear changes
06-29-2010, 12:52 AM
#1
Junior Member
Thread Starter
Join Date: Jun 2010
Posts: 22
Likes: 0
Received 0 Likes
on
0 Posts
W204 350
gear changes
I found the 7G gearbox has the tendency to select the "lower" gear when I am pressing too little throttle while cruising at medium speed.
while manual upshifting is prohibited by the ECU.
one can feel that the lower gears selected by the ECU is in fact slowing the car down instead of rolling freely forward with the momentum.
while manual upshifting is prohibited by the ECU.
one can feel that the lower gears selected by the ECU is in fact slowing the car down instead of rolling freely forward with the momentum.
06-29-2010, 11:09 PM
#3
Junior Member
Thread Starter
Join Date: Jun 2010
Posts: 22
Likes: 0
Received 0 Likes
on
0 Posts
W204 350
I am talking about comfort mode. and I suspect the tendency of picking the lower possible gears will use up more gas.
and that's my concern.
anyway to reprogram the shifting pattern?
and that's my concern.
anyway to reprogram the shifting pattern?
06-30-2010, 12:19 AM
#4
Senior Member
Join Date: Jul 2008
Posts: 385
Likes: 0
Received 0 Likes
on
0 Posts
W204, W220, S15 Silvia
y would u go want to go higher gear than the engine is designed to go at, ur gonna create knock and the fact u have to press harder to get it going at low rev is not gonna save u fuel.
if u r cruising at constant speed it wont change gear, it is unless u want to accelerate, so if u want to save fuel, cruise at constant speed
if u r cruising at constant speed it wont change gear, it is unless u want to accelerate, so if u want to save fuel, cruise at constant speed
06-30-2010, 03:00 AM
#5
MBWorld Fanatic!
Join Date: Jun 2008
Location: San Francisco, CA
Posts: 2,073
Likes: 0
Received 85 Likes
on
69 Posts
2017 E300
yep, they are programmed like that in order for you to have power right at the tap. Makes the car always feel like its braking. of course this wastes more gas.
06-30-2010, 06:34 AM
#7
MBWorld Fanatic!
Free wheel
The 1956 British Rover 90 had a "Free Wheel" knob on the dashboard which when activated allowed the car to freewheel with no engine braking. It also became clutchless in this mode.
Maybe you should suggest this 54 year old mod to MB management.
Maybe you should suggest this 54 year old mod to MB management.
Trending Topics
06-30-2010, 07:16 AM
#8
MBWorld Fanatic!
Join Date: Dec 2006
Location: Europe
Posts: 6,375
Received 295 Likes
on
247 Posts
223.168 & 213.012 & 906.633 & 214.005
If I can follow you, you are actually complaining about too heavy engine braking. In my opinion this design is preferable over the option to run the engine with the highest possible gear even when slowing down. The point is that this allows you to control the speed with your gas pedal, no need to lift the foot and use brakes (majority of driving scenarios, of course brakes are still needed at times). If you don't want the car to slow down. don't lift the gas pedal completely.
