W123 Caster / castor settings for a sedan / saloon?
 

Dear All,

Now I'm getting worried:-

I've been using the caster specifications for a W126 as the W123 FSM CD I've got hasn't got the right chapters - I read here on Peach Parts that that was the solution...

However, it now looks to me like I'm adjusting things too far as the wheel base length is getting longer as I try to obtain a caster of 9 degrees. I'm using the method of turning the wheel by 20 degrees. The straight ahead measurement (that I can't make - no special tool) is 10 degrees.

I now see that values are quoted as 8 degrees straight ahead for a W123 on this link

http://www.benzworld.org/forums/discount-tire-direct-tire-wheel-brake/1182622-alignment-specs-w123-tires.html

So now I'm confused.

Question:-

Does anyone know what the caster setting (measured by turning the steering) for a W123?

I hope someone can help.

(Oh and if you know the answer to this - that would be great too!

http://www.peachparts.com/shopforum/tech-help/281532-w123-tech-specs-reqd-wheelbase-length.html )

Answer
 

Chassis: wheel alignment spec
http://www.peachparts.com/shopforum/diy-links-parts-category/281578-chassis-wheel-alignment-spec.html

Thanks but...
 

Thanks for the answer but I don't see which link states the difference between the two methods of measuring caster.

One method is to use the MB special tool that clamps to the suspension and can simultaneously measure camber and caster...

...The other - more practical method for the DIYer - is to measure the camber when the wheel is turned to 20 degrees left and 20 degrees to the right.

There are different values of caster for each method.

Answer
 

I've now got the data I wanted!
 

I've now got the data I wanted...

I also got the data for a 126 and a 107.

I've put it all together into a pdf file which is attached. Disclaimer - I think this data is good - it is at your own risk if you decide to use it. If you can, check with a specialist or a dealer to make sure.

Thanks Army, you're the coolest. Plus you live in the coolest country.

thanks Army...taking my 82 to be aligned and I want to have this info in hand :-)

Thanks for that, BTW do you feel a difference in steering & drive quality with a change of alignment specs.
Ad

I most certainly did - but then I had just built the front and rear suspension and put in Bilstein HDs...

...totally different car...

...almost felt like a sports car.



(Please note I did say almost!)


How different it would feel on old components I don't know. But I'd guess it would be sharper and more decisive - a bit better than the "point and hope" low mileage one owner always garaged W123s I tried before I bought my bag of nails!