SL/R230 Lumbar switch connection

Feb 21, 2021 | 08:08 AM

6_Myles

Thread Starter

Senior Member

Joined: Apr 2013

Posts: 339

Likes: 66

1998 E300TD

Lumbar switch connection

Morning all (at least here),

while starting a diagnose on the lack of lumbar on both my seats (locks and soft close still worked) I found this condition with the control switch. Do the 500’s and 55’s have different controls units? On the back of the unit it says sl500 in paint pen so I assume this is a salvage part.

I cannot see where this air line would connect.

thanks!

edit: this is the exhaust port for releasing lumbar pressure

Last edited by 6_Myles; Feb 21, 2021 at 08:52 AM.

Feb 21, 2021 | 12:17 PM

MikeJ65

MBWorld Fanatic!

Joined: Aug 2020

Posts: 1,329

Likes: 365

From: Gretna, NE

'03 SL55 Black, '03 SL500's Aegean, Mars Red, Tazanite, Alabaster, '11 S550 Flint Gray

Do you have multi-contour seats? The 'switch' for the standard lumbar only seat is a pressure regulator, 100% mechanical, and has air connections. The 'switch' for the multi-contour seats, like the switch pictured, is 100% electrical. It connects to the control valve in the back of the seat and all air lines are connected directly to the control.