Is my transmission schizo? - Mercedes Benz SLK Forum

SLK R170 General Discussion SLK 200, SLK 230K, SLK 320, SLK32 AMG

LinkBack Thread Tools
#1 Old 10-29-2012
Registered Users
Join Date: Jul 2012
Location: USA
Vehicle: 1999 SLK230 sport
Posts: 23
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 2
Thanked 1 Time in 1 Post
(Thread Starter)
Is my transmission schizo?

Hi All

I all seriousness, I just wanted to get some feed back on some issues I've been having with my 1999 SLK230. Firstly, I notice when the engine is still cold, even after i let it warm up from idling, when I step on the gas pedal the transmission will (from a complete stop) start in 2nd gear then abruptly shift down 1st and shift normally. This only happens when the car is not at its operating temperature and when im starting from a stop, after that it goes away and starts in 1st gear. AND NO ITS NOT IN "W" MODE. Another issue I've noticed is if I slam on brakes, like a panic stop for example, and try to drive off again, the transmission act like its in neutral and the car wont move and the engine just revs OR sometimes it will go but it will just hold 1st gear and wont shift out of it. I usually correct this problem by shifting into park and then back in drive or sometimes restarting the car to let the system reset, so to speak. I am not sure what the issue could be, because it does not slip or anything like that, and the problem is not bad, however it concerns me. I got a P700 malfunction code but I don't know what it means. I've had issues before and had the transmission replaced twice and the control unit replaced as well a little over a year ago. The first time it was replaced because the tranny completely went out. the second time was because the transmission wouldn't shift out of 1st, but my mechanic told me it was the control unit that needed replacing, not the tranny but. Any ways, can anyone that knows a lot about these transmission tell whats up before I take it to my mechanic, I would like to know what to expect.

Thanks a lot I appreciate it
johnnielee123 is offline  
Sponsored Links
#2 Old 10-29-2012
Administrator/Founding Member

jbanks15's Avatar
Join Date: Jun 2006
Location: Tampa, Florida
Vehicle: 2009 SLK 55 AMG Kleemann Supercharger, ECU tune, Headers and LSD, CF Diffuser
Posts: 91,085
Chats: 38
Mentioned: 458 Post(s)
Tagged: 5 Thread(s)
Quoted: 6490 Post(s)
Thanks: 3,232
Thanked 11,020 Times in 8,379 Posts
please update your profile...see below

Welcome to The #1 Mercedes-Benz SLK Forum from Valrico, Florida!

Please update your location/vehicle (model and year) in your profile as it helps the members answer your questions which usually are based on that information.
‘Usercp’ at the top left of page, then ‘edit your details’ on the left side, ‘additional information’ near the bottom, edit your ‘location’ and ‘vehicle’. And it only takes about 30 seconds to do!

You might want to post an introduction in the ‘New members introduce yourself here’ section, if you haven’t already.

Some tips to make your visit here more enjoyable:

If you haven’t, please use the 'search' feature at the top right of the page for your questions as they have probably been asked before. Remember, ‘Search’ is your friend.
In addition, if you haven’t, please post your question in the appropriate discussion forum for a quicker response and only once. Be patient and a knowledgeable member will address your question.
If you wish to become PM (Private Message) - capable, you need 15 posts. To get those 15 posts quickly, just go to the ‘New members introduce yourself here’ section and welcome enough new members to obtain your needed posts to PM.
New members and guests should be aware that the 'New Posts' link next to the 'Search' link top right of the info bar is a great way to see all of the posts you have missed since you were on the forum last. Remember to click 'mark forums read' under ‘quick links’ when you leave.
Also vote or enter our Ride of the Month competition:

Thank you,
Moderator/Founding Member

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

Jeff, US Army Master Sergeant Retired
Administrator/Founding Member
2009 SLK 55 AMG Black/Black
Kleemann Supercharger thread here:

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

Kleemann ECU Tune, headers and downpipes thread here:

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.

OEM MB Plexiglass Draught Stop
Smarttop version 3.22
Previous - 02 SLK 320, 05 SLK 350
jbanks15 is online now  
#3 Old 10-29-2012
Registered Users
Join Date: Apr 2012
Location: Houston, TX
Vehicle: Mercedes SLK 230 2003
Posts: 1,613
Chats: 0
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 44 Post(s)
Thanks: 226
Thanked 377 Times in 265 Posts
Hmm... I would start with checking the transmission fluid level. You need the dipstick for it though.
JaysonM is offline  
#4 Old 10-31-2012
Registered Users
Join Date: Jan 2011
Location: Washington, DC
Vehicle: 2000 SLK 230
Posts: 22
Chats: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 2 Times in 2 Posts
Send a message via Skype™ to westrava
Not sure about your second problem but the first one is a common complaint. From my previous thread:

So this 'problem' seems to be a 'feature.'
From my 2000 SLK 230 manual, page 149:
"With the transmission in gear range "D", "4", or "3", upshifting from from 1st to 2nd to 3rd gear is delayed depending on vehicle speed and engine temperature. This allows the catalytic converter to heat up more quickly to operating temperatures. During this brief warm-up period this delayed upshift and increased engine noise might be perceived as a malfunction. However, neither the engine nor transmission are negatively affected by this mode of operation."

I just got in the habit of letting the car run for about 45 seconds before I drive off. That seems to be long enough to get past this crazy and annoying issue.

westrava is offline  
Sponsored Links

  Lower Navigation
Go Back   Mercedes Benz SLK Forum > Mercedes Benz R170 SLK Class Cars > SLK R170 General Discussion


Quick Reply
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:
Please enter a password for your user account. Note that passwords are case-sensitive.


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

Email Address:


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
2005 SLK350 transmission downshift issue Iridium SLK R171 General Discussion 7 11-30-2017 02:40 PM
7G transmission service completed efair SLK R171 General Discussion 0 06-04-2012 02:46 PM
Torque converter and transmission to be replaced nycboy SLK R171 General Discussion 12 05-06-2010 05:20 PM
Transmission trouble Eightkmeter SLK R171 General Discussion 4 06-09-2009 11:10 AM
Help! Can Comfort Vario Roof Module cause Transmission Problem? ericmb SLK R171 General Discussion 12 04-19-2007 02:01 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.