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1985 300TD, 1991 300D 2.5 Turbo, 1993 300D 2.5 Turbo, 1995 E320 Touring, 2006 E350
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76 Posts
Discussion Starter #1
had to replace the switch on the electronically adjustable steering column on 1995 E320 Estate. Car has power seats but does not have seat memory. The part number listed in the EPC is wrong and the correct part is far more complicated than the part listed as being correct. By the way, the correct part is NLA...So I had to do a little internal switch repair (keeping my fingers crossed). It was an absolute pain to remove and re-install the connector from the switch's wiring harness to the connector on the motor (skinned knuckles on each hand).

Has anyone else had this issue? I called Rusty and he researched and the part number on the side of the correct switch comes up as obsolete and NLA. The normal one for power seats with memory is far simpler and has fewer connections. I can give parts numbers if anyone is interested.

Also, I found this mysterious silver box underneath the dashboard while doing the switch replacement. See attached photo. Can anyone tell me what this box is and/or what it does? It looks like a James Bond-type device and I'm afraid to touch it.

--B&b
 

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About a dozen 1988, 1989, 1990, and 1991 sedans, wagons, 4Matics and 1 coupe
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5,466 Posts
I thought that might be what it was. When/why was that moved from the underhood area near the battery?
 

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2013 SL550 Grey/ Red/Black Ash wood with every option
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428 Posts
Mystery Box

B&b, I believe the mystery box is the "Tempomat" or cruise control unit.
 

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'89 300TE, '79 450SL, '01 ML320
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1,051 Posts
It's the MAS control unit, the 'knob' on the end is the locking mechanism.



Fish
 

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About a dozen 1988, 1989, 1990, and 1991 sedans, wagons, 4Matics and 1 coupe
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5,466 Posts
Yeah, Thorgod, the location is right for the tempomat brain on earlier cars but they didn't have the on/off dial.
 

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Cruise Control
'87 300TD/'90 300D/'94 Quattro/'89 Vanagon TDI/'01 EV Weekender VR6
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52,233 Posts
That thing is confusing to me for two reasons:

  1. Because it's sitting where the Tempomat typically goes
  2. Because the arrows on the knob don't match the I O positions on the unit
 

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'89 300TE, '79 450SL, '01 ML320
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1,051 Posts
Because the arrows on the knob don't match the I O positions on the unit
It is confusing at first glance, but to disengage you would turn it CCW about 300 degrees,

in the direction of the 'O' arrow, not the short 60 or so CW.

Why they moved them from under the hood, I don't know, maybe a moisture issue?



Fish
 

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'92 300TE 4matic 280,000miles, '92 300TE 4Matic 'Ice Blue Metalic' 101,000miles
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10,418 Posts
Which begs the question; Where does the Tempomat reside on this car?

Kevin
 
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