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SLK-Class (R170) 1998-2003: SLK 200, SLK 230K, SLK 320

SLK/R170: Seat relay 2001 320

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Old Dec 15, 2021 | 08:51 AM
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paulwith
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ml350amg slk 320
Seat relay 2001 320
Hi
Both power seats now dead, has been intermittent but now stopped.
I'm assuming a faulty relay, any advice please of location and fitting?
Thanks
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Old Dec 30, 2021 | 11:08 AM
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latemodel21
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2003 SL55 / 2002 SLK32
Originally Posted by paulwith
Hi
Both power seats now dead, has been intermittent but now stopped.
I'm assuming a faulty relay, any advice please of location and fitting?
Thanks
attached is a diagram for the seat control. K24 is the relay, and S22/S23 are the control panels on each seat. The second pic shows the location for the relay (K24)

HTH,
Chris


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Old Dec 30, 2021 | 11:13 AM
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paulwith
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ml350amg slk 320
Thank You Chris,
As it's a RHD vehicle do I assume the relay is on the right above the pedals?
Paul
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Old Dec 30, 2021 | 11:20 AM
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latemodel21
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2003 SL55 / 2002 SLK32
Originally Posted by paulwith
Thank You Chris,
As it's a RHD vehicle do I assume the relay is on the right above the pedals?
Paul
That is where I would look first. The relay has both door-switches as "control" inputs (and draws its power from the K40), so there is no location (under that dash) that is fundamentally better than another ... so it would seem likely that it is mounted above the pedals in the RHD version.

Cheers,
Chris
Last edited by latemodel21; Dec 30, 2021 at 11:24 AM.
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Old Dec 30, 2021 | 11:22 AM
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Thanks
All the best
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Old Dec 30, 2021 | 01:19 PM
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Ps
The seats working for now, would that indicate a faulty relay?
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Old Dec 30, 2021 | 02:35 PM
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latemodel21
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Originally Posted by paulwith
Ps
The seats working for now, would that indicate a faulty relay?
Hard to say. I have never heard of one failing, but if you had easy access (which requires a fair amount of disassembly), you could jump across the relay (from pin 8 to pin 2) and see if that solves it ...
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