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 03-30-2009, 01:42 AM
2002 S430
 
Join Date: Mar 2009
Location: Michigan
Posts: 2
Unhappy Cruise Control 2002 S430 unique issue

Hi everyone,

I have a 2002 S430 whose cruise control works PERFECTLY at 51 MPH or less. However, once reaching 52 MPH or higher, the LED bars around the speedometer blink and the cruise control disengages.

It doesn't matter if I accelerate to any speed 52 or above (let's say 70 MPH for example), then try to engage the cruise control, or if I engage the cruise control at say 40 MPH then use the cruise control lever to try to accelerate to 70. It ALWAYS disengages at 52, the bars around the speedometer blink and the cruise control disengages.

The tire sizes all match and the tire pressure is dead on. Again all functions (accelerate, decelerate, resume, etc.) work PERFECTLY at the lower speeds 100 % of the time. And 100% of the time, I get the same result above 52 MPH.

It all worked perfectly until about a week ago. I first noticed a problem when I engaged it on an entrace ramp, and used the cruise accelerate feature to get up to speed, then had to immediately toggle to decelerate to accomodate traffic. I braked during the decelerate so I could merge with traffic. I believe that's the last time it worked correctly (at speeds over 52 MPH anyway).

Did I stumble on some cruise control lever sequence that set a "top limit" for the cruise control feature accidentally? If so, how do I fix it?

Thanks in advance! I'm certainly stumped on this one!

Reply With Quote
  #2  
Old 03-30-2009, 08:05 AM
Moderator
 
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Most likely related to tire SIZE. Measuring the circumference would confirm that problem
__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
Reply With Quote
  #3  
Old 04-02-2009, 01:58 PM
2002 S430
 
Join Date: Mar 2009
Location: Michigan
Posts: 2
That's amazing! Let me see if more information changes things or not. It's the same tires (Michelin Destiny 215 60R16) that I've had on for about 65,000 miles...

I did just have them rotated and re-balanced at Discount Tire, and the shop said I should get at least another 15,000 miles out of them.

On a side note, these have been GREAT tires... quiet, great ride, better wet and winter traction, and double the expected mileage from wear as compared to the previous Michelin Energy MXV4 Plus.

Could it really be that decreased circumference from tire wear could cause the cruise control to stop working??? Strangely enough though, the problem did start immediately after the tire rotation, so if after the additional info you stand by your diagnosis, I totally believe you and already think you're a genius for the very train of thought!

Thanks for the help and please let me know if I should change out the tires. Was going to do wait until Fall for that, but not if it will fix the cruise control.

Also, are the Michelin Destiny's a good choice for next time? Winter traction is VERY important here is snowy Michigan, followed by quiet, ride, and somewhat less importantly, life of the tire and price.

THANKS AGAIN!

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 11:50 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2022, 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