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w460 failing speedo and combo-turn-signal switch
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Posted 10/7/2018 7:24 PM
rhd280
Member




Date registered: Dec 2014
Location: New Zealand
Vehicle(s): 1982 280GE LWB RHD
Posts: 28
25
w460 failing speedo and combo-turn-signal switch

w460 speedo and combo-turn-signal switch
Chassis 021627 RHD 280GE LWB 1982

At 406,000 miles (2nd engine) and a fill up costs $110 to drive 110 miles, the g wagon is used when I need to haul lots of people or stuff, but not as a daily driver - gets about 600 miles a year. It does show its age from time to time, and this time it is in the cockpit where the speedo is acting up and the turn signal control does not work on right hand turns. 

SPEEDO

The MPH speedo (with small KMH) has developed a click where the speedometer jumps. It's the speedo not the cable. 

Advice Sought: 

1. Is this something I can repair, if so, what are the steps? Do I need parts and if so, what part number and who sells them reasonably priced?
2. Does anyone have a spare they don't need?
3. Is this a standard MB part that is used in other models, like sedans of that era. Anyone have any experience with this?
4. Is there a generic speedo that would fit? It has a mechanical ODO in miles (I live in a KM country, but the g-wagon came from the UK), single light to show turn signal (which I could relocate to the dash) and backlighting.
5. Anyone found a reliable vendor of a new or used speedo that is not a silly price?

COMBO SWITCH

In the last semi-annual inspection, the right turn signal would flash rapidly, but no action at the lights. They told me to fix it before the next inspection. Hazard flasher works, so it's not the bulb or fuse. We took apart the relay, but it seemed OK. It appears to be the unit on the steering wheel. Horn/turn signals/high-low beams/wiper. Eurotruck Importers (http://www.eurotruck-importers.com/index.php?main_page=product_info&products_id=1079) lists a late model (after chassis number 024324), which appears to not have the horn button. 

Advice sought:

1. Is this something I can repair, if so, what are the steps?
2. Does anyone have a spare they don't need?
3. I read that the W123 stalk is the same. Anyone have any experience with this? If so, what part numbers do I look for? Does it have the horn button?
4. Is there a difference between RHD and LHD parts (mine is right-hand drive)?
5. Anyone found a reliable vendor of a new stalk that is not a silly price?
6. Would the EuroTruck unit work if I found another way to connect the horn? If yes, any suggestions on how to wire in a horn switch?
#239897
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Author
Posted 11/1/2018 9:49 PM
hipine



Date registered: Jul 2006
Location: US, CO, Bailey
Vehicle(s): 460 1980 280GE w. 617A
5000
RE: w460 failing speedo and combo-turn-signal switch

I fixed my speedometer when it was doing that by taking out the mechanism (you need to pry all the way around the edge of the bezel and remove the bezel and glass, then remove the two screws from the back and take the mechanism out the front), cleaning old gummy grease from the gears, and then re-lubricating with a very light graphite-loaded grease. I figured after 495k miles I might have to maintain this part a little to keep it going.

I'll have to do a little more investigation on the stalk switch side, but I think the "same as w123" thing only applies to the post-82 version of the stalk where the whole steering column cover is really different from our earlier trucks.

-Dave G.

PS after some looking - and for that same reason (whole different column) the Eurotruck stalk switch won't work on your early style truck. If someone has done an update of the whole driver's side dash cover and column cover and switch to the late style, maybe they could guide you, but I haven't tried that. It would be a worthy update to be able to have access to replacement stalks. The early style one is getting to be unobtanium. I don't have any spare and I don't think they're amenable to disassembly.

Edited by hipine 11/1/2018 9:57 PM
#239992 - in reply to #239897
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Posted 11/2/2018 11:26 AM
oskar
Elite Veteran


Date registered: Sep 2006
Location: Lyons, CO
Vehicle(s): 1981 280GE, 2002 G500, 280SE 4.5, Audi A4 1.8T
Posts: 693
500
RE: w460 failing speedo and combo-turn-signal switch

the combo switch you sometimes can find NOS on ebay, in Eastern Europe.
I got myself a spare there
#239993 - in reply to #239992
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Author
Posted 11/2/2018 2:21 PM
Bruce
Veteran




Date registered: May 2006
Location: Flagstaff, AZ
Vehicle(s): 230GE, 300TD, 200D
Posts: 191
100
Re: w460 failing speedo and combo-turn-signal switch

Perhaps here

https://clubgwagen.com/forum/viewtopic.php?f=21&t=12844
#239995 - in reply to #239897
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Author
Posted 11/3/2018 9:05 AM
Inkblotz
Expert




Date registered: Apr 2006
Location: Georgia
Vehicle(s): 90 300GD "Thundering Turtle II", w/ 603A turbo
Posts: 3055
2000
Re: w460 failing speedo and combo-turn-signal switch

The combo switch is same as used in the W123 cars of that vintage. I think 76-1985. 280E 300D 240D etc...
Sorry I just saw you have the switch with the horn. You will not find that on a 123 car.

Bruce has pointed you in the right direction.

Edited by Inkblotz 11/3/2018 9:08 AM
#239996 - in reply to #239897
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