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Restting the TCU - Make Your Car More Responsive!
#26
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Join Date: Jul 2015
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Mercedes Benz C300 4Matic Sport Sedan
I recently purchased a used 2009 C300 and was wondering if this would be beneficial to me to reset the TCU?
Are there any risks in doing this yourself? Thanks again.
Also how would I know it is reset? Besides driving the car.
Are there any risks in doing this yourself? Thanks again.
Also how would I know it is reset? Besides driving the car.
#27
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Join Date: Jun 2015
Location: New Jersey
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2010 E550 P2 w/AMG Sport Package + Pano, 2015 Nissan Pathfinder
I would assume that simply placing the car in the second position e.g. pressing start but not using the brakes until everything on the speedometer lights up can work? As far as keyless go is concerned or do we have to disable the keyless go?
#28
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2010 E550 P2 w/AMG Sport Package + Pano, 2015 Nissan Pathfinder
I tried it after removing the start push button. It definitely seems to have worked and I even feel like the engine revs quite higher (More upmmhh) thanks for the tip.
#30
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Join Date: Jan 2012
Location: SF Bay Area
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'13 C250 Sport Coupe, '10 GLK350 4Matic, '90 BMW 325i Cabriolet
Just discovered this old thread and will give it a shot in the morning before my commute.
I'm curious though, something that wasn't answered in an earlier thread. How do the shift modes (E or S) affect this TCU re-learning process? The first two-thirds of my commute is up, down, then through windy mountain roads and then the remainder is freeway & suburban streets, depending on which way I go. So, as a result, I usually start off in S mode through the mountainy part and then switch to E on the freeways/suburban part. And then of course vice-versa on the way home...
I've noticed on the downhill part of windy mountains roads that my car will sometimes rev very high when I let off the gas, around 5K or a little higher when in Sport mode (I've got a '13 C250 Sport coupe).
I'm curious though, something that wasn't answered in an earlier thread. How do the shift modes (E or S) affect this TCU re-learning process? The first two-thirds of my commute is up, down, then through windy mountain roads and then the remainder is freeway & suburban streets, depending on which way I go. So, as a result, I usually start off in S mode through the mountainy part and then switch to E on the freeways/suburban part. And then of course vice-versa on the way home...
I've noticed on the downhill part of windy mountains roads that my car will sometimes rev very high when I let off the gas, around 5K or a little higher when in Sport mode (I've got a '13 C250 Sport coupe).
#31
Super Member
Just discovered this old thread and will give it a shot in the morning before my commute.
I'm curious though, something that wasn't answered in an earlier thread. How do the shift modes (E or S) affect this TCU re-learning process? The first two-thirds of my commute is up, down, then through windy mountain roads and then the remainder is freeway & suburban streets, depending on which way I go. So, as a result, I usually start off in S mode through the mountainy part and then switch to E on the freeways/suburban part. And then of course vice-versa on the way home...
I've noticed on the downhill part of windy mountains roads that my car will sometimes rev very high when I let off the gas, around 5K or a little higher when in Sport mode (I've got a '13 C250 Sport coupe).
I'm curious though, something that wasn't answered in an earlier thread. How do the shift modes (E or S) affect this TCU re-learning process? The first two-thirds of my commute is up, down, then through windy mountain roads and then the remainder is freeway & suburban streets, depending on which way I go. So, as a result, I usually start off in S mode through the mountainy part and then switch to E on the freeways/suburban part. And then of course vice-versa on the way home...
I've noticed on the downhill part of windy mountains roads that my car will sometimes rev very high when I let off the gas, around 5K or a little higher when in Sport mode (I've got a '13 C250 Sport coupe).
The high revving when going downhill is the car performing engine braking (descending in a lower gear) allowing you stay within the the power band. You can place the car in E which will shift up allowing you to coast down or you can choose to shift up to 5th or 6th in Sport or E mode to coast.