Power seat ECU repair info

The Jury · 04-26-2007, 04:42 PM

If your power seats crap out on you, the part that fails inside is BTS409L1
SWITCH SMART HIGH SIDE SWITCH.

This is what controls the input on the ecu telling it what to do. The relays are generally never at fault. This switch handles the grunt and grind of everything coming into the unit and therefore can tend to fail after a few years.

You can see the PDF for this part here: http://www.datasheetcatalog.com/data...BTS409L1.shtml

You can see the burnt leg and tracers around the unit. Once you replace this and verify the tracers are back in order, your seat ecu should function well.

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gregory13lil · 04-27-2007, 07:58 AM

Good info thanks!!

The Jury · 05-18-2007, 03:17 AM

needs to be put in a DIY list on the forum or on your favorites because it WILL happen to everyone eventually.

lupo7791 · 05-18-2007, 10:08 AM

I'm having problems with my passenger seat, where is the seat ecu physicaly located. thanks

rrich49132 · 06-29-2007, 06:22 PM

Is this part replaceable in the ecu unit and I assume this is located under the seat.

babyjrluv · 08-07-2007, 12:51 PM

Any more info on how to do this and where its located exactly. I'm about to start the project on fixing both Driver and Passenger seats. Want all the info I can get ahead of time.

Williams707 · 08-07-2007, 09:19 PM

Is the BTS409L1 is inside the Power Seat Control Module?

P/N: 2088200526 Power Seat Control Module

http://cgi.ebay.com/ebaymotors/Merce...QQcmdZViewItem

My passenger seat control "Back & Forward" moves the seat only Forward, all other functions work. The programmed memory buttons moves the seat backward or forward as programmed. So I know it is not a problem with the motor and believe it is a problem with the Control Module.

Any suggestions?

DevilsAngel · 08-08-2007, 12:47 AM

so would this cause the seat not to pull forward when you lift the lever? Cuz when someone gets into the back through the driver side the lever will go up but the seat wont budge.

The Jury · 08-08-2007, 03:25 PM

Just replace this part after you've verified the switch to be ok.

under drivers seat.

babyjrluv · 09-21-2007, 10:37 PM

The Jury I know this might sound like a dumb question but where can I go to buy this little piece BTS409L1. I guess if I buy 2 of them, and remove the ecu from under both seats, unsolder the part and resolder the new BTS409L1 then they should start working again, but where do I go to buy these little BTS409L1? Some kind of electronic store, RadioShack? I dont know but if you do pls pass the information because I can't see this small part costing that much, because the ecu itself is expensive and if you buy a used one from ebay it'll cost you $120 and who knows when that one will crap out, so this is the best way to go, I'm sure the relays haven't gone bad. Any info is greatly appreciated.

unlukky · 09-22-2007, 01:16 AM

Baby,

I found a couple of places that recognize the number.
Show no stock and to call, but maybe they can get you in the right direction.
Advertised for 154 pennies. Not bad.

http://app.arrownac.com/aws/pg_webc/...rch_type=click

Found this one too, but it looks like they deal in bulk. ($100 minimum?).

http://www.ipacgroup.com/google/clic...FQINPAodXVpz9w

I hope it helps,
John

babyjrluv · 09-22-2007, 02:28 AM

Thanks John.

I'm going to look into it and see if they can steer me the right way in the meantime for any of you guru electronic geniuses, if you know where I can go purchase one of these please let me know, Its getting worst to drive my clk i'm all cramped up, fuses keep blowing seats are to high and to foward, its getting out of hand, almost as if this car had a mind of its own.

mattx · 05-03-2008, 07:52 PM

has anyone tried replacing this part or the whole module to see if it solves the problem?

poptopclk · 05-20-2009, 12:27 AM

How do we remove this control box? How do we test it?

bhorne · 10-24-2009, 08:17 AM

I wonder if this part will work BTS409L1E3062ANT

<http://app.arrownac.com/aws/pg_webc/0,4513,,00.html?application=SEARCH&event=1000&sear ch_token=BTS409L1&search_criteria=match_begins_wit h&match_in_stock_only=NO&=&rows_to_display=10&full _domain_name=app.arrownac.com&super_neda=&start_in dex=0&search_type=click>

05-18-2007, 03:17 AM	#3
The Jury Senior Member Join Date: Nov 2003 Location: TN Posts: 477 Drives: clk430	needs to be put in a DIY list on the forum or on your favorites because it WILL happen to everyone eventually. __________________

08-08-2007, 12:47 AM	#8
DevilsAngel Senior Member Join Date: May 2007 Location: Portland, OR Posts: 460 Drives: CLK 430	so would this cause the seat not to pull forward when you lift the lever? Cuz when someone gets into the back through the driver side the lever will go up but the seat wont budge. __________________ ________________ ________________

09-22-2007, 01:16 AM	#11
unlukky Senior Member Join Date: Apr 2007 Location: Vacaville, CA Posts: 276 Drives: 2001 CLK55 AMG	Trying to search the net... Baby, I found a couple of places that recognize the number. Show no stock and to call, but maybe they can get you in the right direction. Advertised for 154 pennies. Not bad. http://app.arrownac.com/aws/pg_webc/...rch_type=click Found this one too, but it looks like they deal in bulk. ($100 minimum?). http://www.ipacgroup.com/google/clic...FQINPAodXVpz9w I hope it helps, John __________________ 2001 CLK55 AMG Silver/ Black 18" Mandrus Millenium/Green Filters/Resonator Delete H&R Sports with 1 Bump pads on all 4 corners Last edited by unlukky; 09-22-2007 at 01:20 AM.

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04-27-2007, 07:58 AM	#2
gregory13lil MBWorld Fanatic! Join Date: May 2006 Location: Fort Hood, TX Posts: 1,123 Drives: 2000 CLK430	Good info thanks!!

05-18-2007, 10:08 AM	#4
lupo7791 Junior Member Join Date: Sep 2004 Location: Massachusetts Posts: 63 Drives: 2001 clk320	I'm having problems with my passenger seat, where is the seat ecu physicaly located. thanks

06-29-2007, 06:22 PM	#5
rrich49132 Almost a Member! Join Date: Feb 2006 Posts: 68	Is this part replaceable in the ecu unit and I assume this is located under the seat.

08-07-2007, 12:51 PM	#6
babyjrluv Almost a Member! Join Date: Jul 2007 Posts: 29 Drives: 2001 clk55 amg	Any more info on how to do this and where its located exactly. I'm about to start the project on fixing both Driver and Passenger seats. Want all the info I can get ahead of time.

08-08-2007, 03:25 PM	#9
The Jury Senior Member Join Date: Nov 2003 Location: TN Posts: 477 Drives: clk430	Just replace this part after you've verified the switch to be ok. under drivers seat.

09-21-2007, 10:37 PM	#10
babyjrluv Almost a Member! Join Date: Jul 2007 Posts: 29 Drives: 2001 clk55 amg	The Jury I know this might sound like a dumb question but where can I go to buy this little piece BTS409L1. I guess if I buy 2 of them, and remove the ecu from under both seats, unsolder the part and resolder the new BTS409L1 then they should start working again, but where do I go to buy these little BTS409L1? Some kind of electronic store, RadioShack? I dont know but if you do pls pass the information because I can't see this small part costing that much, because the ecu itself is expensive and if you buy a used one from ebay it'll cost you $120 and who knows when that one will crap out, so this is the best way to go, I'm sure the relays haven't gone bad. Any info is greatly appreciated.

09-22-2007, 02:28 AM	#12
babyjrluv Almost a Member! Join Date: Jul 2007 Posts: 29 Drives: 2001 clk55 amg	Thanks John. I'm going to look into it and see if they can steer me the right way in the meantime for any of you guru electronic geniuses, if you know where I can go purchase one of these please let me know, Its getting worst to drive my clk i'm all cramped up, fuses keep blowing seats are to high and to foward, its getting out of hand, almost as if this car had a mind of its own.

05-03-2008, 07:52 PM	#13
mattx Newbie Join Date: Oct 2006 Location: NJ Posts: 17 Drives: 1999 CLK320 Convertible	has anyone tried replacing this part or the whole module to see if it solves the problem?

05-20-2009, 12:27 AM	#14
poptopclk Newbie Join Date: Apr 2006 Posts: 14 Drives: clk320 Cabrio 2001	How do we remove this control box? How do we test it?

10-24-2009, 08:17 AM	#15
bhorne Newbie Join Date: Oct 2009 Posts: 1 Drives: clk 320	I wonder if this part will work BTS409L1E3062ANT <http://app.arrownac.com/aws/pg_webc/0,4513,,00.html?application=SEARCH&event=1000&sear ch_token=BTS409L1&search_criteria=match_begins_wit h&match_in_stock_only=NO&=&rows_to_display=10&full _domain_name=app.arrownac.com&super_neda=&start_in dex=0&search_type=click>

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