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Old 12-28-2011, 12:10 PM
pmckechnie pmckechnie is offline
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Join Date: Jan 2003
Location: Matthews, NC
Posts: 1,356
I just dug out a set of seat modules for an 89 420 SEL. The drivers side PN 124 820 09 26 has 8 sockets. The passenger side PN 126 820 00 26 has 7 sockets. My guess is you have a passenger module on the drivers side. Check the passenger side and see if it has an empty socket. Quite ofter people will swap the seats because the drivers side sags from use and the passenger side is still good. That is just a guess.

Paul
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