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Luxury Performance Sedans

10338 messages,  Last post on May 01, 2013 at 3:12 PM

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What is this discussion about? Lexus GS 430, Acura RL, BMW 5 Series, Volvo S80, Audi A6, Infiniti M35, Infiniti M45, Mercedes-Benz E-Class, Cadillac STS, Sedan

Messages Page 909 of 1035

#9072 of 10338 Re: They Ain't Gonna Sell [markcincinnati] by audi_ownera6

Jan 16, 2007 (1:42 am)

Replying to: markcincinnati (Feb 08, 2006 9:43 pm)
Hi,
 
I recently bought a 2006 A6. Everything about this car is just the way I would have imagined except the brakes. When applying the parking brakes I can hear a distinct hum from the rear end of the car. I have driven a couple of loaners and they dint sound anything when applying the parking brake. The service agent says this is normal for the A6's. Secondly when I apply brakes, the car smoothly decelerates and then stops abruptly(I want to say with a jerk). Again the dealer says this is what happens with the brake assist feature when it chips in to anticipate any corrective braking that might be required.
 
Am I being paranoid or is the Audi dealer just giving me some stock answers to problems they cant fix?

#9073 of 10338 Well will the next CTS-V with 600 horses be a LPS ????? by rockylee

Jan 16, 2007 (3:05 am)

I would assume on 08' CTS content alone the next CTS-V would be a true LPS wouldn't it ????? It should be right at the top in performance because the next "V" or as some call it Super-V is getting the new supercharged Corvette SS engine with 600 horses. 0-60 in a "blink of a eye"
 
Rocky

#9074 of 10338 Re: They Ain't Gonna Sell [audi_ownera6] by lexusguy

Jan 16, 2007 (8:45 am)

Replying to: audi_ownera6 (Jan 16, 2007 1:42 am)
"It's normal for them to do that" is the easiest "shut up and go away" answer for a dealer to give about pretty much any problem. The "it's the brake assist" answer is particularly troubling because that's just a flat out lie. Brake assist is only supposed to activate in panic situations if the driver hasn't hit the pedal hard enough for maximum braking. All of my cars have had BA for the last several years, and none of them act like that. Take it to another dealer.

#9075 of 10338 Re: Well will the next CTS-V with 600 horses be a LPS ????? [rockylee] by lexusguy

Jan 16, 2007 (8:55 am)

Replying to: rockylee (Jan 16, 2007 3:05 am)
No, the next CTS-V will not be a LPS. Neither will the M3, RS4, C63, IS-F, or S60R. It doesn't matter how big the engine gets or how fast it goes. The Ariel Atom will outrun pretty much any car including a 600hp CTS to 60. That doesn't make it a LPS. Cadillac's LPS continues to be the STS.

#9076 of 10338 Re: They Ain't Gonna Sell [audi_ownera6] by tayl0rd

Jan 16, 2007 (11:49 am)

Replying to: audi_ownera6 (Jan 16, 2007 1:42 am)
Remember that the parking brake of the new A6 is an electronic unit. Not many other manufacturers use that type of brake. The hum you're hearing is the motor activating the brake.
 
With the "jerky" braking, it's probably either the Electronic Brake force Distribution (EBD) or the transmission downshifting into first gear. It's probably the downshift. I believe I've read from other A6 owners that their cars sometimes jerk when downshifting. Pay attention to the brake pedal the next time you're coming to a stop. If you feel a slight pulse up on the pedal, it's the EBD kicking in. What that does is send a little more braking force to the rear brakes. It only kicks in for panic stops and below a certain speed. For nearly all cars (except BMWs) 85+% of the braking is done by the front brakes. This is why the front brake systems are larger than the rear and also why the front brakes have more brake dust and wear out sooner than the rears.

#9077 of 10338 Re: They Ain't Gonna Sell [tayl0rd] by upuaut

Jan 16, 2007 (1:12 pm)

Replying to: tayl0rd (Jan 16, 2007 11:49 am)
For nearly all cars (except BMWs) 85+% of the braking is done by the front brakes.
 
Why not BMW's, are they exempt from the rules of physics?

#9078 of 10338 Re: They Ain't Gonna Sell [audi_ownera6] by markcincinnati

Jan 16, 2007 (2:46 pm)

Replying to: audi_ownera6 (Jan 16, 2007 1:42 am)
The HUM you hear is, IME, normal. It is an electronic motor activating the parking brake. I hear it, it is faint and it lets me know the brake is applied.
 
The other jerking you feel is NOT normal and is no way associated with Brake Assist.
 
The answer is lazy.
 
The culprit COULD be the transmission especially if you are in S mode which forces a HARD shift to first gear.
 
There are adjustments and parts that can be made and replaced if this is a true out of spec condition, which I think it sounds like.
 
Don't take the lazy answer.
 
My brakes are great.

#9079 of 10338 Re: They Ain't Gonna Sell [upuaut] by warthog

Jan 16, 2007 (4:52 pm)

Replying to: upuaut (Jan 16, 2007 1:12 pm)
Given the weight transfer, I can't understand why most of the braking wouldn't be done by the front wheels in all cars (except maybe a huge SUV with gold bullion in the wayback). However, my experience with a 2002 Passat is that the rear brakes wear out at about twice the rate of the front. It's a mystery.

#9080 of 10338 Re: They Ain't Gonna Sell [upuaut] by cdnpinhead

Jan 16, 2007 (5:17 pm)

Replying to: upuaut (Jan 16, 2007 1:12 pm)
For nearly all cars (except BMWs) 85+% of the braking is done by the front brakes.
  
Why not BMW's, are they exempt from the rules of physics?
 
It could have to do with "anti-dive" suspension geometry. My car has it, and BMW's may also. If the rear of the car doesn't lift & transfer a huge proportion of the downward force (weight) of the car to the front wheels during braking, the rears take a more nearly equal fraction. When I hit my brakes really hard, the car just squats down, applying plenty of weight to the rear.
 
Look around -- many cars that have ventilated front discs (most/all in this board) may or may not have ventilated rears. Cars with a sufficiently sophisticated suspension will have 4 ventilated discs. For all I know, all these do, but I doubt it. The Germans almost certainly do, given that they're designed to run at 100 mph or so continuously. The Asians will be efficient -- if they don't need ventilated rears, they won't fit them.

#9081 of 10338 Re: Well will the next CTS-V with 600 horses be a LPS ????? [lexusguy] by rockylee

Jan 17, 2007 (2:59 am)

Replying to: lexusguy (Jan 16, 2007 8:55 am)
What category does it fit in ???
 
Rocky

Messages Page 909 of 1035

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