Computer/electrical glitch
Thread Starter
Junior Member
Joined: Nov 2011
Posts: 46
Likes: 0
2009 CLS 550
Computer/electrical glitch
I'm not really expecting any feedback on this since it was a one-time deal (so far...), although if anyone else has had similar issues it would be interesting.
One morning when I started the car (2009 CLS 550) the SRS light didn't go out. Then, as I was driving down the road I noticed that the Parktronic was activated (it's supposed to deactivate at 10 MPH) even though I was going 40 MPH. Then I noticed that I could hardly read the climate control panel and then realized that the COMMAND screen was in night mode colors (this was a clear sunny day around 8:30 AM). Also, the volume control on the steering wheel was inoperable. After about 15 minutes of driving, a "Check tire pressure monitoring system" came on.
I continued driving for another 15 minutes, shut the car off and re-started it. All malfunctions seemed to be gone. Shut the car back off, restarted it a few hours later and drove the half hour home with no further issues to date (about a month of mostly daily driving).
One morning when I started the car (2009 CLS 550) the SRS light didn't go out. Then, as I was driving down the road I noticed that the Parktronic was activated (it's supposed to deactivate at 10 MPH) even though I was going 40 MPH. Then I noticed that I could hardly read the climate control panel and then realized that the COMMAND screen was in night mode colors (this was a clear sunny day around 8:30 AM). Also, the volume control on the steering wheel was inoperable. After about 15 minutes of driving, a "Check tire pressure monitoring system" came on.
I continued driving for another 15 minutes, shut the car off and re-started it. All malfunctions seemed to be gone. Shut the car back off, restarted it a few hours later and drove the half hour home with no further issues to date (about a month of mostly daily driving).
Thread Starter
Junior Member
Joined: Nov 2011
Posts: 46
Likes: 0
2009 CLS 550
It wasn't raining the day it happened. I don't recall the weather two days earlier (the most recent time I had driven it), but at worst it just would have been typical highway conditions - not like fording standing water or anything like that.
Member
Joined: Oct 2007
Posts: 81
Likes: 2
CLS-LotusS4-ZR1-M5-E31850x2
This happened to me twice first time after i drove through a good sized puddle my car is lowered so im wondering if something under the car got wet I will be looking into it further when I have some free time. I also noticed that when the weather gets very hot the car sometimes acts up.
Super Member
Joined: Apr 2007
Posts: 737
Likes: 38
From: Fort Worth, TX
2019 CLS450/ 2002 CLK55
Something to consider. If the battery is a little older and maybe not holding a full charge; these cars will shut down "secondary" systems until the battery juices back up. Possiblity?
John
(My car actually gave me a message saying something like "lo batt/ some systems not avail" or something like that.
John
(My car actually gave me a message saying something like "lo batt/ some systems not avail" or something like that.
Thread Starter
Junior Member
Joined: Nov 2011
Posts: 46
Likes: 0
2009 CLS 550
The battery was replaced by MB last fall after a cell died in the original. I haven't had any issues other than this one since, even after parking for a week or more throughout the winter, so the battery is not likely the problem although anything is possible.
