Notices
M-Class (W166) 2012, Read about the upcoming M-Class

Vibration/shudder when slowing?

 
Old 03-21-2013, 09:56 AM
  #1  
Member
Thread Starter
 
Bonk's Avatar
 
Join Date: Apr 2009
Location: Toronto
Posts: 80
Likes: 0
Received 1 Like on 1 Post
'13 ML350 BT, '10 C63 (gone)
Vibration/shudder when slowing?

I've had my ML350BT for about a month now and I notice that there's a bit of a shudder/vibration when slowing to a stop or to make a turn. This seems to occur most frequently when the engine is cold. I though it may be the brakes, and the problem does seem to go away after 10 minutes and a few brake applications, but I've also noticed the shudder when coasting to a stop with no brakes applied. Could it still be the brake pads since they still contact the rotors even when no brakes are applied?

Anyone else notice this problem (which goes away after 10-15 minutes and a few brake applications)?

Is this something I should just 'live with'? It's hard to know what's normal with this new vehicle so other's feedback is helpful.

The other thing that really irks me is the hard shifts when cold. The engine doesn't want to shift till above 2000 rpm and when it does it revs up another 600-800 rpm and then drops 1000 rpm. Again, only when cold. Is this 'normal'??
Bonk is offline  
Old 03-21-2013, 11:24 AM
  #2  
Member
 
Join Date: Sep 2011
Location: SW FL
Posts: 144
Received 3 Likes on 3 Posts
2018 GLE 43 SUV
The higher shift points when cold are normal. Helps the engine warm up faster. This is SOP for most diesel engines.

I have not experienced a shudder when slowing or turning, but some BT owners complain of stumbling and bucking when accelerating with a cold engine.
Shrdlu is offline  
Old 03-21-2013, 05:47 PM
  #3  
Member
 
Join Date: Jan 2013
Posts: 113
Likes: 0
Received 0 Likes on 0 Posts
ML350
I noticed a slight shudder on firm braking to a stop a few times, normally one would say it was warped discs but no way was that the case, I feel like it is some driveline resonance with the gearbox perhaps still connecting the engine to the slowing wheels, like there was a small disagreement between the engine ecu and the gearbox and the brakes, a battle of momentum. It stood out more because the majority of the time the drive train is very smooth.
jellies is offline  
Old 03-21-2013, 07:41 PM
  #4  
Member
Thread Starter
 
Bonk's Avatar
 
Join Date: Apr 2009
Location: Toronto
Posts: 80
Likes: 0
Received 1 Like on 1 Post
'13 ML350 BT, '10 C63 (gone)
Originally Posted by Shrdlu View Post
The higher shift points when cold are normal. Helps the engine warm up faster. This is SOP for most diesel engines.

I have not experienced a shudder when slowing or turning, but some BT owners complain of stumbling and bucking when accelerating with a cold engine.
Ok, it's my first diesel so I'll just have to get used to that jerky hard shift when cold.

Originally Posted by jellies View Post
I noticed a slight shudder on firm braking to a stop a few times, normally one would say it was warped discs but no way was that the case, I feel like it is some driveline resonance with the gearbox perhaps still connecting the engine to the slowing wheels, like there was a small disagreement between the engine ecu and the gearbox and the brakes, a battle of momentum. It stood out more because the majority of the time the drive train is very smooth.
I concur with your feeling about driveline resonance... it's hard to pinpoint the source, but I can feel it under the footwell. If it happens sometimes when not braking like it does for me, then that gives credit to the driveline/transmission theory. Again it seems to go away when fully warmed up.

Anyone else notice this? It's not something easily ignored, so it may not be that widespread of a problem if no one else is complaining. I think I'll have to call it in.
Bonk is offline  
 

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

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Vibration/shudder when slowing?


Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: