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C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

SAM Module

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Old 09-16-2010, 10:04 PM   #1
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SAM Module

I have a 2001 C240, my battery died so I boosted it and the
ESP "not working" light came on. I parked it overnight and the next day I boosted again but now
-ESP" not working" and
-ESP malfunction and
- BAS light came on.
I took to the Mercedes dealer, they changed the battery and told me I need a SAM module also. I took the car with out changing the SAM and my wipers, turn signals, door locks, gas gauge don't work. Does anyone have any idea. I went in for a battery change and now I need a module...I don't get it!
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Old 09-16-2010, 10:26 PM   #2
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The 2001 SAMs are very fragile. You blew it by jump starting (boosting) the car. You have to be very careful with this even on newer cars. No option but a new SAM.

Good luck!
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Old 09-16-2010, 10:52 PM   #3
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This happened to me a few years back... had mb roadside come out and install my battery... The tech swapped out my battery and ended up frying my SAM (i believe its the rear)... I had the same exact issues you state... Then they charged me for a new SAM plus labor.....

Today I actually went and bought a new battery from the dealer... i was nervous during installation because I did not want to repeat what happened before... Installation went okay except some how i triggered the car alarm when removing the + and -. Alarm keep on going off even after I completely removed the battery. But once I installed the new battery I was able to disable the alarm with my key.....

bottom line... you need a new sam... its probably a really easy DIY... I think its located in the trunk on the left side..

good luck
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Old 09-16-2010, 11:10 PM   #4
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The best way to change a Benz battery is to keep the car powered up with a quiescent current device.
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Old 09-16-2010, 11:11 PM   #5
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it does require coding with star
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Old 09-17-2010, 08:09 AM   #6
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i have a 2005+ Front SAM for sale :-) i had it on my Car for like a week then went back to the Original one becuase it doesnt have the Location Light Option :-)
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Old 09-17-2010, 10:24 PM   #7
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I followed the owners manual step by step on boosting the car. Maybe they did burn out the SAM at the dealership. I have no way to prove it. Thanks all for the replies.
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Old 09-18-2010, 05:39 AM   #8
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Yep! - owners manual jump starts never worked on early cars. The SAMs did not even like being powered down. The fact that you got an ESP/BAS light after boosting is a sure sign.
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Old 09-18-2010, 07:51 AM   #9
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next time, just take out the battery and take it to autozone or kragen. They'll recharge it for free. Usually takes about an hr and just reinstall. I did this a few times before i did my seat control module fix.
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2001, 2026, battery, benz, c240, c320, control, front, key, mercedes, module, sam, smart, unit, w203


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