Hello guys,

I know almost all parts are compatible between the two models, however, I know that the shock absorbers are not.

So what about the springs? Are they compatible or not?

Thanks

 

I would also like to know since I'm looking for new (front) springs.
From what I've already read the springs are identical in dimensions, yet differ in spring rates.
Didn't find any precise spring rate numbers though ..

 

I looked extensively to try to find the SLK 320 spring rates and was never able to find anything. The MB dealer didn't have the info, nor could I find it on the SLK sites.


You might try Donovan at Ground Control Systems in California. His company makes after market suspension packages for the SRT and NA XF. The springs have different rates than factory, and they use an adjustable shock. I bought the "Touring" version package and am having it installed tomorrow.

 

The shocks for the '320 DO fit our cars.

https://www.crossfireforum.org/forum...yb-shocks.html
(Go to post 14.)

I don't see why the springs wouldn't.

 

Thanks for the clarification. I ordered the KYB's specific for the Crossfire since they are the same price.

Also, there is a $40 rebate on KYB shocks if you purchase them by tomorrow (April 30th).

I ended up purchasing some SRT6 springs off a forum member. Otherwise, I probably would have given the SLK320 springs a shot.

Maybe next time I need new springs I will update this thread after trying them out

 

WEll, I don't buy nothin without checking with those here who have already done it.

 

Yes, I've learned to do the same!

 

I searched some more and the final answer is yes and no.

By searching the springs in the catalogue of Suplex (http://www.mladov.ru/katalog/suplex/..._2008-2009.pdf) I found out that the rear springs are identical, yet the front springs are not.
However, I used the Suplex part codes to get the dimensions from this (Dutch) site: Veer vooras SUPLEX 19347 | MijnAutoOnderdelen.nl
Note: this spring is the correct N/A front spring, SRT = 19348 and rear = 19219

Weird thing about suplex though is that the rear springs are identical between the N/A and SRT. Is this correct? Front springs are a LOT thicker (1.5mm) and lower (25mm).

I concluded that the SLK320 springs (19202) are higher (7mm) and thicker (0.2mm). So they should fit, yet you gain a higher ride height since the total length is longer and the spring is stiffer (at least I assume the materials used are the same thus thicker equals stiffer).

I got DOT3 pads in front so I could win about 8mm in height. Yet I don´t know if that would drop the car enough to cancel the lift of the SLK springs. So at this point I´m leaning towards the (more expensive) Suplex 13947 springs because I don't want the car te be any higher. Rear springs should be a direct fit.


edit:

See attached photo


Could anyone measure their N/A or SRT springs in length and diameter? Then I can double check if these springs are the correct ones.

 

Went ahead and ordered a pair of Spidan 85598 springs. Exact same dimensions as the Suplex and direct replacement (19347=85598).
Will post an update when I replaced the springs and compare them.

 

Dutch XF …
Do you have a Coupe or a SRT-6? I need a set of front springs for my 2004 Coupe (base model) as well. Are the Spidan 85598 springs a direct replacement for our Crossfire base model front springs?

Thanks ….

 

I have a limited coupe, so Spidan 85598 / Suplex 19347 are the replacement springs. Same for base models and convertibles.
For the SRT is would be 85599 and 19348, these are stiffer and lower, convertible SRT will be different (softer).

 

~ yes... i had slk eibach pro-kit springs had on my '04 crossfire before eibach produced a set specifically for the crossfire. the slk springs sat a bit lower than the revised application (which i preferred).

also i never had to changed my spring pads for adjustments to the height.

 

Installed the Spidan springs today, can confirm it's a direct fit.

 

It's tough to say either way since the source of dimensions is aftermarket supplier dimensions. They could be manufacturing a "one size fits all" to make more sales rather then matching OEM directly. I do recall an article or video saying the Crossfire used a different spring rate (not size) than the SLK.

You might want to investigate the AMG version springs if you go the Merc part numbers.

 

Cedar11

Click on the link, this will give you some view points concerning a swap of springs.
1. The spring rate is softer
2. The tires provide a different ride, the SLK has a taller side wall, when compared to our low profile tires on the Crossfire. This is the reason the SLK's have a softer ride.
3. A full conversion must take place, springs, new wheels and tires... BIG $$$$ conversion
Good Luck
Dennis
DTMenace

https://www.crossfireforum.org/forum...uspension.html