Steering Coupling Guide SLC 450

1971-1989: 280SL, 280SLC, 300SL, 350SL, 350SLC, 380SL, 380SLC, 420SL, 450SL, 450SLC, 450SLC 5.0, 500SL, 500SLC, 560SL
Post Reply
User avatar
cjhols
Pagoda
Posts: 122
Joined: Sun 31 Mar, 2013 10:06 am
Model you own: w107
Location: Bendigo Australia

Steering Coupling Guide SLC 450

Post by cjhols » Fri 27 Apr, 2018 7:38 am

Hi all,
I'm after the ultimate guide for replacing the steering coupling on a SLC 450.
Thanks
Peter
1973 SLC 450
1971 Clubman Mini

User avatar
AMG
OZBENZ Admin
Posts: 5788
Joined: Thu 01 Jan, 1970 10:00 am
Model you own: I own multiple different models
Region: New South Wales
Location: Dark side of the Moon
Contact:

Re: Steering Coupling Guide SLC 450

Post by AMG » Sun 29 Apr, 2018 5:20 pm

Nothing difficult about it.

Section 46 of the factory service manual has several documents which cover various jobs. the most pertinent document relates to the jacket tube, which is not the coupling, but the main diagrams are in 46-620.
46-620.pdf
remove steering wheel.
undo the lower dash, remove carpet.
remove the floor cover plate for the steering column.
remove the coupling bolts, mark the column shaft and box shaft for the sake of alignment (steering wheel)
undo the steering colum to dash crossmember bolts and slide the column rearward.

remove coupling from steering box.

put new coupling on and finger-tighten bolt.

insert steering column spline into the coupling, refit the column to crossmember bolts. refit the cover plate. ensure the correct engagement and splines are aligned.
Tighten coupling.
Ensure the steering wheel is correctly aligned.
refit the trim pieces as required.
You do not have the required permissions to view the files attached to this post.
Current:
1987 560SL 4sp. auto Signalrot "Stella"
1987 190E 2.3-16 5sp. man. Blauschwarz "Hermann"
1992 300CE-24 6sp. man. Perlblau / Iceblau "Gretel"
1992 Range Rover Classic 4sp auto Ardennes Green "Oswald"
2012 E63 AMG Speedshift MCT Diamantweiß "Klaus"
Previous:
1986 560SEL Anthracitgrau "Schultz" - In Mercedes Heaven
1987 190E 2.6 4sp. auto Signalrot "Sabine" - which now resides/owns Andrew M's Garage
1972 350SLC Astralsilber "Lurch" - now in the loving care of Craig B
1989 2.5-16 Blauschwarz 4sp. auto (parted) formerly owned by Derek/Hasan.
2012 Renault Sport Megane RS265 Trophy 8:08 6 sp. man. Liquid Yellow "Jean Rédélé"

User avatar
cjhols
Pagoda
Posts: 122
Joined: Sun 31 Mar, 2013 10:06 am
Model you own: w107
Location: Bendigo Australia

Re: Steering Coupling Guide SLC 450

Post by cjhols » Sun 29 Apr, 2018 8:16 pm

Thanks
Unfortunately it might be a little more difficult than I first thought. The top of the Hex bolts have been stripped.
Hmmmm
1973 SLC 450
1971 Clubman Mini

User avatar
cjhols
Pagoda
Posts: 122
Joined: Sun 31 Mar, 2013 10:06 am
Model you own: w107
Location: Bendigo Australia

Re: Steering Coupling Guide SLC 450

Post by cjhols » Sun 06 May, 2018 10:00 pm

Hi All,
Just to reassure those wanting to replace their steering coupling that it wasn't too much of a hassle. I it took me about 3 hours but most of that time was wasted under the car. Recommend tackling it from inside. You can get to both the hex bolts. Did go under the car to tighten the front hex on re-assembly. All in all made a world of difference. O'h and while I was at it I fixed the lights and stuck odometer in the instrument cluster. A good weekends work !
Thanks
Peter
1973 SLC 450
1971 Clubman Mini

KimB
300 SLR
Posts: 1575
Joined: Thu 20 Dec, 2007 5:57 pm
Model you own: w126
Location: Sydney

Re: Steering Coupling Guide SLC 450

Post by KimB » Mon 07 May, 2018 10:29 am

Hi Peter,

Re stuck odometer, what did you do to unstick it? Normally, if the odo doesn't turn it's due to a stripped plastic gear.
I ask because both odos in my w126s aren't turning.
Cheers,
Kim
W126 86 300SE Champagne
W126 84 380SEC Signal Red

User avatar
Chai
OZBENZ moderator
Posts: 653
Joined: Fri 04 Nov, 2005 11:49 am
Model you own: w107
Location: Melbourne

Re: Steering Coupling Guide SLC 450

Post by Chai » Tue 08 May, 2018 9:15 pm

The 107 (and 116) are prone to have the odo stop working. I was told that zeroing the tripmeter while the car is moving can cause this fault.
The metal shaft for the odometer spins but the plastic rotary dial slips around that shaft.
Repair was by roughening the shaft with a pair of pliers, application of a very tiny amount of glue and forcing the plastic dial back into the shaft (plus ensuring the odometer reading is unchanged).
Chai
1974 450SLC

User avatar
cjhols
Pagoda
Posts: 122
Joined: Sun 31 Mar, 2013 10:06 am
Model you own: w107
Location: Bendigo Australia

Re: Steering Coupling Guide SLC 450

Post by cjhols » Tue 08 May, 2018 10:47 pm

Yeah I probably got a little too rough with mine by "centre punching" around the end of the shaft. I found the shaft ( during re-assembly) would not go through the first cog so I had to file my work down a little. I put tape across the dials to hold them and then used a suitable drill bit to replace the shaft whilst I worked on the shaft. Make sure you measure the amount/distance of 'roughing up' that needs to be done ( the first time I didn't take into account the shaft overhang and had to re-do it / extend it.
Not a hard job - just check that your cogs / plastic screws are in good nick.
You can see if the cog is slipping - I used an electric drill, a skewer and piece of tape to turn the Odo (Anti C/W) and watched the end cog (It didn't move / slipping).
All the best
Peter
1973 SLC 450
1971 Clubman Mini

User avatar
Tony From West Oz
OZBENZ moderator
Posts: 3206
Joined: Mon 20 Jun, 2005 9:04 pm
Model you own: w202
Location: Bedfordale WA

Re: Steering Coupling Guide SLC 450

Post by Tony From West Oz » Wed 09 May, 2018 9:55 pm

The W123 series are also affected by the slipping odo shaft, resulting in an odometer that does not work. The same fix works for the W123 series also.
Life is a journey, with problems to solve, lessons to learn, but most of all, experiences to enjoy.

'83 W123 300D 325000km (Wife's car Josephine - sold).
'84 W123 300D replaced good OM617 912 with OM617 952 and enjoyed having good acceleration for the first time since first driving a 300D in 2002 - became engine and trans donor for 300CD Turbodiesel conversion. Now parted out.
'86 W124 300D sold (Wife's old car - sold )
'85 W123 300CD, 275 000km (Fatmobile) rebuilt turbodiesel from previous Fatmobile transplanted into 280CE (SOLD)
'99 W202 C250 Turbodiesel (my darling Wife's car - Sold)
'98 W202 C250 Turbodiesel (my car - Sold)
'06 Ssanyong Musso Crew Cab 2WD Ute (OM662 diesel and Auto Transmission)

User avatar
AMG
OZBENZ Admin
Posts: 5788
Joined: Thu 01 Jan, 1970 10:00 am
Model you own: I own multiple different models
Region: New South Wales
Location: Dark side of the Moon
Contact:

Re: Steering Coupling Guide SLC 450

Post by AMG » Thu 10 May, 2018 8:42 am

The problem is widely known, and there are replacement gears available - odometergears.com had a write-up about 15 years ago or so. Not sure if it still exists, but you can buy the replacement gears you need from them.
Current:
1987 560SL 4sp. auto Signalrot "Stella"
1987 190E 2.3-16 5sp. man. Blauschwarz "Hermann"
1992 300CE-24 6sp. man. Perlblau / Iceblau "Gretel"
1992 Range Rover Classic 4sp auto Ardennes Green "Oswald"
2012 E63 AMG Speedshift MCT Diamantweiß "Klaus"
Previous:
1986 560SEL Anthracitgrau "Schultz" - In Mercedes Heaven
1987 190E 2.6 4sp. auto Signalrot "Sabine" - which now resides/owns Andrew M's Garage
1972 350SLC Astralsilber "Lurch" - now in the loving care of Craig B
1989 2.5-16 Blauschwarz 4sp. auto (parted) formerly owned by Derek/Hasan.
2012 Renault Sport Megane RS265 Trophy 8:08 6 sp. man. Liquid Yellow "Jean Rédélé"

Post Reply

Return to “W107 Coupe and Roadster models”