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x164 GL450 Diff lock system overheated. Wait briefly

6999 Views 6 Replies 3 Participants Last post by  Romangl350
Firstly let me start by apologising if this issue has been discussed before on this model car. The admin can dome a favour and move this to the right post...thanks.
I have a 2009 GL450 Diesel, i have had this car for almost a year now, when i first bough within a week i had the rear speed sensor failed and i replaced it with (after market) and the magnet holding feel when turning stopped and all was well, but now every time i put the accelerator down to take off quick like at give way stop or traffic lights, i get a beep beep noise and on my dash i get a message (Diff lock system overheated. Wait briefly) and this will stay on for a mile or two and it will go off on its or sometimes it will go off when i have stopped switched the engine off and on again. (I don't if this issue used to be there before the sensor was replaced or not) This is annoying as i don't know wether by keep ignoring it and keep driving it am causing harm to the differential or something else? i have tried to plug it to a diagnostic machine and the only code that comes up is (right speed sensor carry out visual inspection) i have carried out visual inspection and everything seems fine no bent pins or damaged sensor or i don't know what it could be. Am being tempted to go and buy OE part from dealer and try to see if this goes but then what if it doesn't go and problem still persists. Pls if anyone experienced this before i will be more that happy to hear your stories or mainly your fixes.
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Hi i have fitted original MB Sensor and now the car shows ABS and ESP inoperative as soon as i hit 20 mph from start up. and it stays on and does not go away. i tried 2 sensors both Original, but both shows the same. i have now resulted in the fault being the magnet on the wheel bearing, so i have ordered one and will try get it fitted this week.
Other than that i can see no one has experienced what am experiencing. So could be my car only. I will still update when bearing is fitted.
Just a quick update my car all sorted now! Happy with the drive again now ABS lights or diff messages and no issues at all.
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Hey mate,
I'm having exactly the same issues. ABS AND ESP lights plus diff lock overheating.
Did it end up being the magnet on your hub/bearing?
Yes it was the rear wheel bearing. Once that was replaced, it resolved the issue.
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