2008 Mercedes SLK 280 SRS light cam on after I unplugged the connection under the drivers seat. How do I reset it and make the warning light on the dash go away?

Visit the on-line store, know as reliable-store, they have the repair manuals. I'm sure you will get the solution of your problem.
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Is this light on due to having the battery disconnected or did it just come on?

Mercedes SRS Airbag Light MOT FAIL How To Fix - YouTube

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https://www.youtube.com/watch?v=JVEuOzYaH1M
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Mercedes E W211 SRS Airbag Warning Light - How to turn it ...

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How To Reset The ESP Light On A Mercedes Benz

www.mademan.com/mm/how-reset-esp-light-mercedes-benz.html

Jul 11, 2010 - They will check to see if your Mercedes Benz shoots out any codes. They will check .... How To Reset Airbag Light On A Dodge. Need to know ...

Best tool to reset SRS light - MBWorld.org Forums

the only way this comes on is if the steering wheel or any of the air bas have been tamperd with or knocked also there are censors under the bumper at the front that could have been knocked plus the modual for the srs light is under the centre console under ash tray if these have been removed and the unit knocked this would cause this to happen also check the harnesses under the seat are conected as well if all these are in order im afraid its to the dealers for an srs reset there is no other way of reseting this unless you know some one with a reset tool

Do not panic but instead consider calling a dealer to avoid making any mistakes here.

Just repaired that same problem on my the old ladys 2007 slk 280. Found flexible cable similar to that of a speedometer cable pulled out of end of seat motor. Feel around underneath seat towards back of seat for loose end of flex cable and simply slip it back in the slot at the end of motor

disconnect battery then feel under the seat for the wiring loom that goes to teh pyrotechnic on the seat belt ,clean the connection both ends with a black lead of a pencil then reconnect the battery and try it again if no joy then its a dealer only job as encrypted software used

Here's a quick check list for most common cost of SRS / Air bag problem.


Dirty contacts on driver and passenger seat belt buckles

Dirty contacts on seat belt connectors (under seats)

Dirty contacts on driver and passenger sides weight sensors (under seat)

Seat covers

Weight on passenger seat

(Example: grocery package trigger SRS / Air Bag light on the way home.)

I recommend you to pass an vacuum over the contacts and use CRC electronic parts cleaner to rule out connectivity problem.

I DO NOT disconnecting the negative battery connector to clean the code(s)

Without the code(s) the dealer will takes "BILLABLE" time to reproduce the problem.

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Please rate my answer if it is useful to you.


Cheers,

Mustgo

Here's a quick check list for most common cost of SRS / Air bag problem.

Dirty contacts on driver and passenger seat belt buckles

Dirty contacts on seat belt connectors (under seats)

Dirty contacts on driver and passenger sides weight sensors (under seat)

Seat covers

Weight on passenger seat
(Example: grocery package trigger SRS / Air Bag light on the way home.)

I recommend you to pass an vacuum over the contacts and use CRC electronic parts cleaner to rule out connectivity problem.

I DO NOT recommend disconnecting the negative battery connector to clean the code(s).

Without the code(s) the dealer will takes "BILLABLE" time to reproduce the problem.

======

Please rate my answer if it is useful to you.

Cheers,

Mustgo

hi,send your car to dealer to scan the problem,maybe erase fault is require ,or you can found the exact defective part,ty