Weird symptoms from my 350. Can any manual drivers help? - Mercedes Benz SLK Forum

General Discussion Topics must pertain to all 3 generations of SLK - R170, R171 and R172

 
LinkBack Thread Tools
#1 Old 03-22-2007
 
Join Date: Jul 2006
Posts: 10
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
(Thread Starter)
Weird symptoms from my 350. Can any manual drivers help?

So when my SLK350 was stock, it used to chirp when I shift at high RPM's from 1st to 2nd and sometimes from 2nd to 3rd. I then got 18 inch Brabus Monoblock Vi wheels, and it still chirps when I shift at high RPM.

However, after lowering my car with H&R springs, I slowly began to realize that the car doesn't chirp when I shift anymore. I'm not sure when this exactly started to happen since I don't try to do it on purpose. It's just that now I'm beginning to notice it because the wheels used to grip the road and chirp when I shift at high RPM's. But now, when I shift quickly, the rear just kind of loses grip for a second, sways, and then goes to the next gear. It's not an immediate switch like it used to when it chirped and gripped the road right away.

Do you guys have any idea with whats causing this? Could the 18 inch wheels and lowering springs be what's causing this? Or could it be that my clutch is worn and that I need to get a new clutch?
Thanks!
dwei42 is offline  
Sponsored Links
Advertisement
 
#2 Old 03-22-2007
 
Join Date: Jan 2007
Posts: 1,167
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
I do not know exactly, but I think it is a question of the ESP control. If you are switching the gears and you speed up to fast, you´re losing the grip and the ESP (launch control) minimizes the power, the car sways and gets grip again. All that is a question of yours tires, too. New, good ones are not losing the grip as fast as a bad or old rubbers.
Banned is offline  
#3 Old 03-22-2007
Founding Member

 
Ynot's Avatar
 
Join Date: Jun 2006
Location: Colorado
Vehicle: 06' MBZ SLK
Posts: 4,599
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 23 Post(s)
Thanks: 1,013
Thanked 402 Times in 285 Posts
Garage
It doesn't sound like a problem to me, OWL is right, if you are shifting to fast or have bald/bad tires, it's losing grip and ESP is doing what it should, try going really slow and skip a gear, eg. on 2nd gear go up to 3000rpm and shift to 4th, you should not hear a chirp.

997 TPC turbo C4S
981 Boxster S
06' SLK 350, Iridium/Ash all pkgs. 6-spd, 19" DCR. (Gone but not forgotten)


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Ynot is offline  
 
#4 Old 03-22-2007
Registered Users
 
Join Date: Jan 2007
Posts: 274
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 1
Thanked 7 Times in 5 Posts
Several causes

Sounds to me like your springs, although lower, may be a tad softer, thereby absorbing the shifting weight to the rear which could be the cause.

More grippy tires would elimite chirps... is your treadwear rating under 400?
Slipping clutch would be obvious and isn't the problem here.
ESP could be a culprit, but the tell-tale signs should have been present on your previous setups. Put your car in dyno mode and give it a shot.

Another factor could be the temperature of the asphalt and tire pressure.

Are you using run-flats?
in2dwww is offline  
#5 Old 03-23-2007
 
Join Date: Jul 2006
Posts: 10
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
(Thread Starter)
The problem is not the ESP because I tried it with the ESP off. I'm also guessing its the springs...
dwei42 is offline  
#6 Old 03-23-2007
Founding Member

 
Ynot's Avatar
 
Join Date: Jun 2006
Location: Colorado
Vehicle: 06' MBZ SLK
Posts: 4,599
Country:
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 23 Post(s)
Thanks: 1,013
Thanked 402 Times in 285 Posts
Garage
Quote:
Originally Posted by dwei42 View Post
The problem is not the ESP because I tried it with the ESP off. I'm also guessing its the springs...
Could be the springs but it should settle already after a week of driving, might be clutch related, you might want to asked DanSLK.

997 TPC turbo C4S
981 Boxster S
06' SLK 350, Iridium/Ash all pkgs. 6-spd, 19" DCR. (Gone but not forgotten)


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Ynot is offline  
Sponsored Links
Advertisement
 
Reply

  Lower Navigation
Go Back   Mercedes Benz SLK Forum > General Discussion about Mercedes Benz SLKs > General Discussion

Bookmarks

Quick Reply
Message:
Options
Upload your files to MEGAUPLOAD
Upload your images to ImageShack

Register Now



In order to be able to post messages on the Mercedes Benz SLK Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
55 or 350 manual? Adamantium SLK R171 General Discussion 33 02-20-2009 05:35 PM
Drivers republic alroumi Off Topic 4 04-29-2008 03:00 AM
Speedtronic to limit valet drivers speed? nmslk General Discussion 9 01-03-2008 07:27 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome
 

Clubs, Garage Plus vBulletin Plugins by Drive Thru Online, Inc.