hi,Do you mean the rear parabolic springs?
Lots me completely, the Bump stop English V elsewhere is just a secondary impact shock absorber. Rubber spacers between springs are sound and impact absorbers.
Raised metal blocks betwwen the chassis is based on low and high variant models such as a raised camper or in the NAFTA models on Tins for allowance of 16" rims as opposed to the normal 15" rims
At the same time a 4x4 of which is raised as to center of gravity,as to ground clearance. same as a 5 metric tonne Cab over chassis variant refereed to as a 616 cdi.
If I look at what you have asked for ,you state 4.6 T this unit is a 5.1 MT unit, down rated to 4.6 MT [OR AS DESIGNATED ON YOUR SPECS A 4.45 TO 4.95 mt VARIANT] with dual rear wheels, with multiple parabolic springs under the SAA codes your main spring will read 903 3200 1850 three designated codes for springs;= X 004 070928 as an example
Your rear main parabolic spring on the eye shackle has a MB number stamped into the actual SPRING IT'S NOT REMOVABLE AS IS THE PRINTED NUMBERING SEQUENCES AS TO CODEX ON THE FACE OF YOUR MAIN PARABOLIC SPRING. it-represents the loadings as to your front axle it should read 1850 on a Tin cargo van or 1900 KG on a Cab-over chassis unit.
Again your question asks down-rating to 3500 ,unless its a Cargo van single wheel job this model 4.6 can not be configured by down weighting to a 3500 KG unit,unless you can get a certificate from the TUV that the van is used for non commercial use, and it's for private or passenger use only.
You can swap over rear springs to two as a 3.8 GVM /variants one raised the height,with softer ride Or the other is for a lower ride designed to be firmer and carry a higher weight.
ON the Tin ,there was on H/D parabolic single spring that up rated the GVM capacity to 3.8 GVM, and the Compliance plates still remained 3500KG.
Are you looking for a tax plate compliance get out of ticket! or attempting to bring a 4 /5 series van back to 3.4 GVM to get out of the stricter emission controls applied to a 3500.5KG and over van.
I don't think you can do it with out a rectification from an engineer ,if you succeed then a new plate is designated as to the GVM ,now days its a transport approved yellow sticker stating it's new certificated weight.
One member in the UK has a 4.2 GVM SuSi super single wide rear wheel unit van that has a re-certificated plate back to 3.8 or 3500KG variant.and this is a current model 2010 NCV.
I'm just telling you what mercedes told me.....A likely story... Tongwell know what springs suit what. As if VOSA have all the answers and DC ask them for advice?![/I]
I have the figure of 30mm in my head over the packers, but don't have anything on paper to confirm it - I'll see what I can do.
Edit: yes, they need to be 30mm in height. I'm afraid I don't have more information regarding the technical calculations.
I'm just posting what mercedes told me. phone them up yourself if you really think I'm lying.No worries. I see what you're saying, but really the info doesn't belong to anyone. I was able to find out the spacer height pretty easily.
Let's not kid ourselves that the manufacturer really couldn't figure this one out if they wanted to - more likely the case that they don't see the need to get involved. They'd rather just sell you the other springs after all.
I think you should re-read what I wrote-I did not say Svtech own maths.SVtech arrived at calculations in a format mutually agreeable with VOSA. SVtech don't own mathematics!
I've explained the process facing you to achieve the goal and answered your question, whilst expressing an opinion which disagrees with the one put to you by the dealer.
SVtech want £300 - what's the forum advice cost you so far? Seems misunderstood through the ether? Re read, nothing personal in it.
Loz, as a bystander (by-reader?) i read mean_in_green to say that *Mercedes* was not telling you the whole truth available to them.
In no way did i see him as saying that you were (to use your term) "lying".
So direct your ire towards Mercedes for withholding information, not to mean_in_green.
It is quite common (at least here in the US) for government agencies to withhold information submitted by one applicant for "proprietary commercial" (or simple privacy) reasons.
(just think of how many lawyers would be put out of work if actual examples of "accepted submittals" were widely available...)
Well after a lot of messing about and backwards and forwards letters from the dvla, I finally got my 4.6t sprinter downrated to 3.5tDon't be daft! Post up how you get on with the task, I'm sure this could become a very useful reference thread.