Smooth Stops... Is it possible?
10-03-2007, 04:05 AM
#71
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Originally Posted by flyingpuck' post='477323' date='Oct 3 2007, 03:27 AM
I'm apalled, I recently purchased a CPO 2005 545i and have been trying to figure out how to smoothly stop the car. In fact the car is sitting at Bob SMith BMW right now being diagnosed and "repaired" for this exact malady. So far they have come up with it being related to a software issue, and are updating it as we speak. My 545i is a steptronic transmission driven predominantly in normal not sport mode. The idea of having to relearn simple braking in a car of this level of engineering is simply mind boggling. 
10-03-2007, 07:18 AM
#72
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My Ride: 2004 545i, Auto, Titanium Silver Metallic, Black Leather, Sport and Premium Packages, HUD
I think it boils down to two issues:
1. At idle, the car produces too much forward thrust - I say this because even from a stand still, putting the car in D causes a bit of a lurch forward. I idle at about 700 RPM with the A/C on. Its still too hot here to run without it. That said, when stopping you're also fighting the car's desire to keep moving.
2. The brakes are *very* grippy - tried stopping smoothly even in N, it still happens. The car comes to a speed at which the grippiness of the brakes overcomes to momentum of the car, and they lock.
Number 1 above is annoying even when starting out. For example, when leaving my garage the car feels like it wants to leap out of the garage the second I put it in D. It surges against the brakes, and they groan at the load. Interestingly, I seem to remember a similar A/C related issue with my E30 many years ago (high idle, lurchy behaviour).
Number 2 I'm not sure about. Sure, they're big brakes, but you should still be able to modulate them a lot easier than you can. It almost feels like the brakes are over boosted. I wonder if DSC is playing a role in this? I'll have to test this out.
1. At idle, the car produces too much forward thrust - I say this because even from a stand still, putting the car in D causes a bit of a lurch forward. I idle at about 700 RPM with the A/C on. Its still too hot here to run without it. That said, when stopping you're also fighting the car's desire to keep moving.
2. The brakes are *very* grippy - tried stopping smoothly even in N, it still happens. The car comes to a speed at which the grippiness of the brakes overcomes to momentum of the car, and they lock.
Number 1 above is annoying even when starting out. For example, when leaving my garage the car feels like it wants to leap out of the garage the second I put it in D. It surges against the brakes, and they groan at the load. Interestingly, I seem to remember a similar A/C related issue with my E30 many years ago (high idle, lurchy behaviour).
Number 2 I'm not sure about. Sure, they're big brakes, but you should still be able to modulate them a lot easier than you can. It almost feels like the brakes are over boosted. I wonder if DSC is playing a role in this? I'll have to test this out.
10-04-2007, 06:19 PM
#73
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My Ride: 2008 550i Jet Black on Black Leather, SAT with Paddles, Logic 7, Comfort Seats, NAV, Sport Package, PDC, Xenons, Sirius, Trinity 12W LED Angel Eyes, RPi GT Exhaust, M rear spoiler, ACS Roof Spoiler, Tinted Tail Lights, Bimmian Carbon Fiber Pillar Trim, Bimmian Shadow 550i emblem, RPi Scoop, E60 Forum Cling, Mtec bulbs in fog lights, Mtec 2W LED for License Plate Light Bulbs, K&N Filter, Bimmian LED Smoked Side Markers, Blackout roundels, Carbon Fiber Kidney Grills.
Retired Rides - 1989 325i convertible, 1995 M3, 2002 X5, 2005 545i, 2008 X5 (Lemon)
Now it has been 3 days, and the dealer STILL has my car for this braking issue, though they swear the software update will solve the problem. We'll see! 
10-04-2007, 08:23 PM
#74
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My Ride: 2008 550i sport SAT
2012 535i Xdrive msport
2007 550i Sport w/SMG (gone)
2000 528i (gone)
1991 535i (gone)
Originally Posted by sixcard' post='472331' date='Sep 20 2007, 05:12 PM
Thought I graduated to ?Junior?, I am still a newbie with only 2200 miles on my ?08 550 sport.
Not sure how F this AQ is, but I browsed into the 'Smooth Stops" thread about tranny slam, accel hesitation, etc.
I think I may have experienced some jerk or slip or bump while down shifting approaching a stop. I never hard brake for known stops and these have happened when almost stopped, like DS from 2 to 1. And not very often.
Q1: is this the issue being discussed in the thread?
Q2: I did not see many ?08 550 sport folks in the thread ? is this unique to my ride?
Q3: What is this about all the references to the ?CIP25.2?s, software updates, etc.? What are they and how does one get up to speed with them?
Q4: Why do I not have ?permission? to enter a FAQ in the FAQ forum category?
Appreciate the education in advance.
Not sure how F this AQ is, but I browsed into the 'Smooth Stops" thread about tranny slam, accel hesitation, etc.
I think I may have experienced some jerk or slip or bump while down shifting approaching a stop. I never hard brake for known stops and these have happened when almost stopped, like DS from 2 to 1. And not very often.
Q1: is this the issue being discussed in the thread?
Q2: I did not see many ?08 550 sport folks in the thread ? is this unique to my ride?
Q3: What is this about all the references to the ?CIP25.2?s, software updates, etc.? What are they and how does one get up to speed with them?
Q4: Why do I not have ?permission? to enter a FAQ in the FAQ forum category?
Appreciate the education in advance.
10-04-2007, 10:18 PM
#75
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My Ride: 2004 545i, Auto, Titanium Silver Metallic, Black Leather, Sport and Premium Packages, HUD
Tried turning DTS off completely (hold the button in for about 10 seconds until iDrive states it is completely disabled). No apparent difference. I'll try playing with it some more in the following days. I'm going on a road trip so it should be a good opportunity to test it out.
10-05-2007, 05:25 AM
#76
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My Ride: E90 330i + E60 550i
its really a embarassing fault on BMW's part. A 10k kia, 15k gm, 20k honda, 30k audi, 40k mb can all stop like a normal car should...but our E60 cant stop properly? Anyone have success with the software update?
10-05-2007, 06:53 AM
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My Ride: 2004 545i, Auto, Titanium Silver Metallic, Black Leather, Sport and Premium Packages, HUD
Originally Posted by s4iscool' post='478262' date='Oct 5 2007, 06:25 AM
Anyone have success with the software update?
10-05-2007, 08:27 AM
#78
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My Ride: E90 330i + E60 550i
yes the CIP, i was hoping that this was the same as the "2-1 TIP" procedure that another memeber said was successful on their car. my dealer was clueless when I mentioned this 2-1 procedure
10-05-2007, 09:30 AM
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I too think this is down to the brakes being very "grippy". We have a new 535d Sep07. Whilst we have no transmission slams, it was quite surprising how much bite the brakes have, almost like they are over assisted. There is also next to no movement in the pedal in terms of being able to progressively apply the brakes. Im sure for those with some transmission down shift issues the problem will be exagerated.
For me, it was just a case of adjusting to it, to be honest I find I really have to feather the pedal just as the car comes to a stop to prevent it which hasn't been too much trouble to get used to. However my wife (god bless her driving skills
) still hasn't mastered this and is getting quite frustrated with it.
As others have said, you don't expect this on a car of this caliber, I don't really have a problem with it but I can understand why some do.
For me, it was just a case of adjusting to it, to be honest I find I really have to feather the pedal just as the car comes to a stop to prevent it which hasn't been too much trouble to get used to. However my wife (god bless her driving skills
) still hasn't mastered this and is getting quite frustrated with it.As others have said, you don't expect this on a car of this caliber, I don't really have a problem with it but I can understand why some do.