Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 01-30-2007, 09:58 PM
Registered User
 
Join Date: Jan 2007
Posts: 196
W202 shift pattern adjustable by dealer?

After hearing so many stories from my friends who own VAG vehicles it makes me wonder this: Is the dealer capable of reprogramming your shifter program so you get softer/sharper shifts? The C220 I'm driving shifts like I'm shifting - in a race car probably - so it's pretty harsh for city driving.

Is it fuzzy logic have I been driving the car too hard lately and cause the computer to think I want it to shift as quickly as possible? If it's fuzzy logic can I or the dealer make it reset and start learning from scratch so I can slow down the shifts?

searched but most threads are for 80s Mercedes.... thanks.


Reply With Quote
  #2  
Old 01-30-2007, 10:23 PM
Registered User
 
Join Date: Aug 2003
Location: Phoenix
Posts: 3,726
The dealer could do it, or you could do it, by adjusting the vacuum modulator on the side of the transmission.
Reply With Quote
  #3  
Old 01-30-2007, 11:21 PM
Registered User
 
Join Date: Sep 2006
Posts: 106
When was the last time you changed the transmission fluid? Even though the trannys were supposed to be life-time sealed, most people are advising to change the fluid somewhere in the every 30-60k range.

If you want to reset things, what about trying the 10 minute battery disconnect routine? Have your radio code handy and read up in the manual on resetting the windows and sunroof.
Reply With Quote
  #4  
Old 01-30-2007, 11:37 PM
Registered User
 
Join Date: Feb 2004
Location: Walnut Creek, CA & 1,150 miles S of Key West
Posts: 4,874
Your post doesnt say what year yours is....the below procedure works on my 99 W210 with a 722.6 trans.

1. Turn the ignition key to the on (not start) position.

2. Press the gas pedal to the floor and hold for five seconds.

3. Turn the key to the "off" position (don't remove the key), then release the gas pedal.

4. Wait at least two minutes for ECU to reset.
__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)
Reply With Quote
  #5  
Old 01-31-2007, 10:16 AM
Registered User
 
Join Date: Aug 2003
Location: Phoenix
Posts: 3,726
It would be nice to know what it is, but a C220 is always a 722.4, at least in the U.S.
Reply With Quote
  #6  
Old 01-31-2007, 06:01 PM
Registered User
 
Join Date: Jan 2007
Posts: 196
got more detail on that vacuum modulator tuning? I don't think my transmission got fuzzy logic it turns out.

thanks.
Reply With Quote
  #7  
Old 01-31-2007, 06:52 PM
Registered User
 
Join Date: Aug 2003
Location: Phoenix
Posts: 3,726
Try a search, and/or this:

http://www.mercedesdismantlers.com/722.3and722.416_transmission_adjustments.html
Reply With Quote
  #8  
Old 01-31-2007, 10:55 PM
Registered User
 
Join Date: Jan 2007
Posts: 242
if your not familiar with how to adjust the vacuum modulator, I suggest you bring it to a garage who knows, to avoid getting worst result.
If your knowlegable with the shifting cable (located on the engine compartment) I would suggest check for a moderate slack on that cable first before you proceed to adjust the transmission vacuum modulator. (in adjsuting the modulator you would need a pressure guage plus data for your tranmission.
Reply With Quote
  #9  
Old 02-01-2007, 10:25 AM
Registered User
 
Join Date: Jan 2007
Posts: 196
From the dismantler's page it looks as though it's just a seat of the pants kind of tuning??

That first picture in the dismantler's website is so small I can't make out where that blue cap thing is located? On the transmission? or under the hood?

I wouldn't think the cable would be the issue then? Coz it shifts at the right time, just shifting really really hard....
Reply With Quote
  #10  
Old 02-02-2007, 02:32 PM
Registered User
 
Join Date: Jan 2007
Posts: 196
broke out the trusty hydraulic jack and went under the car....

the white pvc tube is off the transmission.....errr yeah.

So shoved it back into the rubber tube and all is well.
Reply With Quote
  #11  
Old 02-02-2007, 03:20 PM
Registered User
 
Join Date: Aug 2003
Location: Phoenix
Posts: 3,726
For future reference the vacuum modulator is on the driver's side of the transmission. You may have to jack up the car a couple of times but it can be sort of a seat of the pants operation - play with until it feels right.
Reply With Quote
  #12  
Old 02-02-2007, 05:34 PM
Registered User
 
Join Date: Sep 2006
Posts: 106
>>the white pvc tube is off the transmission.....errr yeah.<<

"Cinderella story" to be sure! Gotta' love a simple fix.
Reply With Quote
  #13  
Old 02-02-2007, 09:48 PM
Registered User
 
Join Date: Jan 2007
Posts: 196
I also noticed fixing this fixed my no-cruise control issue. The cruise control was probably acting up because it couldn't get an accurate vacuum reading from the engine.

I'm so happy everything is in good shape now.
I just need to maybe replace the signal stalk for flash function and all my new (to me) benz problems are solved.
thanks everyone for their help!!!

Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 12:32 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page