Letting off gas at ~15-25 MPH feels like there's a lot of resistan
06-04-2011, 05:56 AM
#1
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The title isn't the best way to describe it but I am trying to figure out if this is normal behavior. I think the loaner I had pretty much felt the same way, so I am thinking it may be but I haven't really ever experienced this in another car.. so not sure what to think.
My car -> 2010 535i with xDrive.
In other cars I've driven, when you are accelerating and let of the gas it kind of just cruises and will slowly drop speed with no resistance/drag feeling. However, with my car when I am going around 15/20/25 MPH and I left of the gas to 'coast' it feels like I am suddenly hitting a lot of resistance or almost like the brakes are being applied. It doesn't jerk or anything but it has this feeling I can quite describe. Nothing wrong with the car, no noises from it, and this is pretty much all the time.. noticeable any time I let of the gas at slow speeds in the parking garage, parking lot, etc. Is this normal or indicative of anything that sounds familiar? I do think the loaner I had felt about the same, so I am guessing it may just be the car but wondering if everyone else with 5 series or 535's at least experiences this/has any commentary.
My car -> 2010 535i with xDrive.
In other cars I've driven, when you are accelerating and let of the gas it kind of just cruises and will slowly drop speed with no resistance/drag feeling. However, with my car when I am going around 15/20/25 MPH and I left of the gas to 'coast' it feels like I am suddenly hitting a lot of resistance or almost like the brakes are being applied. It doesn't jerk or anything but it has this feeling I can quite describe. Nothing wrong with the car, no noises from it, and this is pretty much all the time.. noticeable any time I let of the gas at slow speeds in the parking garage, parking lot, etc. Is this normal or indicative of anything that sounds familiar? I do think the loaner I had felt about the same, so I am guessing it may just be the car but wondering if everyone else with 5 series or 535's at least experiences this/has any commentary.
06-04-2011, 07:34 AM
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My Ride: 2010 535i M Sport 6MT
Model Year: 2010
I own GM, Lexus and BMW vehicles (E60 and E90). The BMW exhibits engine braking at any low speed. My Lexus LS uses engine braking when I tap or apply the brakes. The GM vehicles do not exhibit much engine braking at all, at any speed.
06-04-2011, 09:51 AM
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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)
06-04-2011, 11:12 AM
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My Ride: 2009 535D M Sport Carbon Black, 172s, Boot spoiler, Tinted Glass, Media pack, Visabilty Pack, Hifi Upgrade, Electric memory heated Seats, Heated steering Wheel, Sport auto Trans,
You are driving a bmw with efficient dynamics which has brake energy regeneration. And a very clever auto box. I think that is what you can feel.
06-04-2011, 01:53 PM
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I was just reading through the Bently manual today on this... it describes how it will automatically upshift in certain conditions, using engine braking... part of this is it measures how fast the throttle closes (how fast you take your foot off the gas), and how fast you apply the brakes. Sounds like part of the transmission mapping is what you are experiencing. Drive it more and a) you'll get more used to it when it happens and b) the transmission will adapt itself to your style of driving.
06-06-2011, 01:44 PM
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My Ride: 08 535xiT - Sapphire Black / Beige
As andrewsweetnam said - regenerative braking. These things are such electricity hogs [hence the 60 lb battery], that they use technology usually reserved for electric / hybrid vehicles. You'll also notice the uselss little mpg gauge on the bottom of the speedo dial getting worse and worse instant mpg when you let off that gas at that speed, then at about 5 mph it goes back to like 50mpg.
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