Date registered: Mar 2006
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this is long post, but without wanting to be dramatic, it could save you $$$$!!
I had ExactlY the same problem with my v6 e240. I phoned my local benz stealership and the master tech typically said "never heard of that".
It transpired that a gasket on my transmission had failed. I did not know this for a -long time- as no oil dropped on my driveway. However I occasionaly got the defective oil sensor message.
When i did see oil on my driveway, i got my indy to check the car and ultimately he replaced a transmission gasket. Cost was £70 ($130). From memory, he had to remove all of the 'lifetime' transmission fluid to enable correct fitment of the new gasket.
The car did have to go to benz to have the trans oil level checked. It transpired that my indy could not check the transmission oil level himself as he did not have the MB 'special' tool for checking the trans oil level. MB checked my trans & diff oil level, for free, but i think that was a favour. MB also wanted to replace the lifetime trans oil at a cost of some £200 ($370) . My indy reckoned this was pointless- he simply recycled the 'old' oil (14k old).
Anyway, i dont want to scare you, but i have read that some w210 owners, have had transmission oil escape & 'wick' up the transmission computer wires into the trans computer itself, causing the trans computer to fail. cost to repair and replace is BiG wonga $$$$
btw, my indy, said that the gasket fails if you drive like a knob. The trans gets uber warm and the gasket goes 'pop'.
Thats what the benz tech told my indy when he enquired about this problem.
In sum and at a guess!
If your wondering what the cause of this error message is, i would humbly suggest, that it -could- be leaking oil from your trans, which is in someway effecting the transmission electronics
Im obviously no w210 guru. But thats my experience.
Last edited by wuzoo; 05-26-2006 at 03:10 PM.