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Old 09-20-2017, 03:33 PM
Doktor Bert's Avatar
Doktor Bert Doktor Bert is offline
Das Sturm Uberdoktor
 
Join Date: Jan 2005
Location: Palm Springs, CA.
Posts: 2,669
R129 Power Seat Moves On It's Own:

Happily retired, and living in high altitude obscurity, and playing music full time, I occasionally help a few SoCal shops with very strange technical problems, mostly on Ferrari and Lamborghini...although I do not officially advertise these services.

Recently, I received a referral regarding a SoCal MBZ Independent for assistance on a 1995 SL600 that had been worked on by several area shops without success.

I decided to post the data from this repair in hopes it may help someone.

VEHICLE: 1995 SL600

SYMPTOMOLOGY: DRIVER'S POWER SEAT MOVES FORWARD/TILTS FORWARD ON ITS OWN WHEN IGNITION IS TURNED ON AND DOOR IS CLOSED AND DOES NOT STOP.

BACKGROUND: (5) DIFFERENT SOCAL MBZ SHOPS HAVE ATTEMPTED REPAIRS UNSUCCESSFULLY - DISCONNECTING POWER SEAT SWITCH HAS NO EFFECT.

REPAIR HISTORY: POWER SEAT SWITCH AND POWER SEAT CONTROL UNIT RECENTLY REPLACED WITH BRAND NEW MBZ COMPONENTS - NO CHANGE.

TECHNICIAN'S FINDINGS: REMOVE SEAT FOR TESTING. CONDUCT PIN-BY-PIN TESTING. DISCOVERED FAILED SEAT BACKREST RELAY MODULE (DRIVER'S SIDE) PART # 129 821 00 47.

ACTION TAKEN: REPLACED MODULE # A 129 821 00 47. SEAT NOW FUNCTIONS NORMALLY. ALL THREE MEMORY PRESETS CAN NOW BE PROGRAMMED.

TOTAL TIME CHARGED: 5 Hours
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Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership
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