BenzWorld Junior Member
Date registered: Sep 2008
Vehicle: C320 sedan
Mentioned: 0 Post(s)
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The battery has been changed only about 1.5 years old, I had the battery tested and it is still good.
I took the vehicle out last night for a short drive, under 8 min door to door. when i started it the speedometer needle did jump for about 8 sec then stoped . When I got to the desination (again short drive), I took the key out of ignition and the needle started to jump again for a few 8 or so seconds and then stopped, which is weird because once key is out of ignition there should be no power, but seems there is still some residual power for a few seconds while things are shutting down.
With the very cold weather could it be that the battery, or alternator or something else isn't fully charged yet with the short drive or when it has been sitting for a while and then started? Or the car isn't warmed up yet? I don't know it doesn't make sense. Seems only to do it when its cold out and when the car isn't warmed up. When the car is warmed from driving it for a while the speedometer needle doesn't act up.
Again these are the symptoms:
-Only in Cold weather and when car is cold or hasn't been warmed up
-speedometer needle jumps/rattles between the 0 - aprox 5 kms/hr and lasts 8 seconds
-tachometer and gas guage needles don't work while speedometer needle is jumping, once speedometer needle stops, tach and gas guage needles go to normal positions
-in situations where the car is only driven for short distance (under 10 min) and car is not warmed up and weather is cold when I remove key from ignition, speedometer needle will jump again for 8 or so seconds then stop.
Maybe I'll take a short video clip of it and post it on youtube.