automatic shifts hard - Mercedes-Benz Forum
Reply
 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 08-20-2008, 06:48 AM
BenzWorld Junior Member
 
Date registered: Mar 2008
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Thread Starter)
automatic shifts hard

I need some input from anyone about slk 230 with an automatic transmission shifting hard when it is not warmed up. The car is a 1999 model and has 42,000 miles on it.
dryd8486 is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 08-20-2008, 07:37 AM
BenzWorld Elite
 
Date registered: Oct 2007
Vehicle: 2002 SLK 230 1986 560SL 2008 Honda CRV
Location: Rochester,NH USA
Posts: 3,665
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Start with checking the fluid level.
livefreeordie is offline  
#3 (permalink) Old 08-20-2008, 07:41 AM
BenzWorld Elite
 
Kirill's Avatar
 
Date registered: Jul 2003
Vehicle: 01 SLK 320 MT6
Location: Lake In The Hills,IL
Posts: 4,477
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I suggest not checking - but replacing the 10 year old oil in transmission. Drive it for a couple days, replace again. Depending how clear it is - may be drive it for another week and replace again.

Kirill
Kirill is offline  
#4 (permalink) Old 08-20-2008, 11:40 AM
BenzWorld Member
 
TomPappas's Avatar
 
Date registered: Dec 2004
Vehicle: 1998 SLK230
Location: Scottsdale, Arizona
Posts: 50
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
A '99 with 42k? The tranny oil has probably ossified.

(Just kidding - mine is a '98 with 41k.)

Ich bin ein Geschwindigkeitsgrenzebrecher!
TomPappas is offline  
#5 (permalink) Old 08-25-2008, 06:54 AM
BenzWorld Junior Member
 
Date registered: Mar 2008
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Thread Starter)
Will see when tranny was serviced, just purchased in march if no history will change out transmission fluid, thanks.
dryd8486 is offline  
#6 (permalink) Old 08-25-2008, 06:57 AM
BenzWorld Junior Member
 
Date registered: Mar 2008
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Thread Starter)
Hope not! will flush transmission change out tranny fluid. Thanks
dryd8486 is offline  
#7 (permalink) Old 08-25-2008, 06:59 AM
BenzWorld Junior Member
 
Date registered: Mar 2008
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Thread Starter)
That is the first thing to do for sure, thanks. Then will have transmission serviced. Thanks!
dryd8486 is offline  
#8 (permalink) Old 08-25-2008, 03:52 PM
BenzWorld Member
 
Date registered: Apr 2005
Vehicle: 1999 SLK 230
Location: Atlanta, GA
Posts: 59
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
hard shift when cold

my 99 SLK 230 will hard shift out of low gear only when cold.I usually let it fast idle until it automatically goes to slow idle(30 seconds?)...the trans really likes another 30 seconds of warm up after that...then it smooth shifts with no problem...I don't mind the wasted one minute as I'm rarely in that big of a hurry...

recently did the total AT fluid change out(TC,too) at 50k miles and the AT is shifting fine...it still likes a little warm up,though...

later,ch7ckc
ch7ckc is offline  
#9 (permalink) Old 08-25-2008, 11:37 PM
BenzWorld Member
 
Date registered: Jun 2007
Posts: 159
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Our '98 (built in '97) also has just over 42K and we had the "lifetime" automatic tranny fluid serviced for the first time earlier this year. Before that shifting wasn't really hard, but it wasn't really smooth either. Now it's like silk by comparison.
richsadams is offline  
#10 (permalink) Old 08-26-2008, 07:06 AM
BenzWorld Junior Member
 
Date registered: Mar 2008
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Thread Starter)
Talked to mb dealer service person and stated that this is normal for this transmission. This is normal for this auto shift transmission and it would need warm up time, not only for transmission but the engine too, and this is a built in design element.

Thanks
dryd8486 is offline  
Reply

  Mercedes-Benz Forum > Mercedes-Benz Roadster Forums > R170 SLK Class


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
Display Modes
Linear Mode Linear Mode



Similar Threads
Topic Author Forum Replies Last Post
transmission shifts hard student123 W202 C-Class 29 08-28-2008 11:21 PM
Hard shifts 96 E320 makesstuffup W210 E-Class 11 01-17-2008 10:01 PM
Shifts Into Drive Hard Sometimes mountainrivera W126 S,SE,SEC,SEL,SD,SDL Class 4 06-03-2007 07:27 AM
Hard shifts, Quick shifts??? shunkmb W123 E,CE,D,CD,TD,TE Class 7 04-05-2007 07:07 AM
Hard Shifts conbobway W124 E,CE,D,TD Class 1 12-12-2006 09:54 AM

Posting Rules  
You may not post new threads
You may not 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