Same issue,
Fiat plate says 3600 and autotrail plate says 3500. Contacted autotrail who said the Fiat chassis is rated at 3600 hence the plate but Autotrail give the option of 3500 for driving licence issues (over 70's).
No difference to the Fiat chassis.
Autotrail sent me all the paperwork and a new uprated sticker to stick over the old one, just a paperwork exercise with DVLA to change and get the extra weight. If you want to re-classify the tax then you have to change at taxation time and have it changed to a PHGV. Tax is cheaper.
Fiat plate says 3600 and autotrail plate says 3500. Contacted autotrail who said the Fiat chassis is rated at 3600 hence the plate but Autotrail give the option of 3500 for driving licence issues (over 70's).
No difference to the Fiat chassis.
Autotrail sent me all the paperwork and a new uprated sticker to stick over the old one, just a paperwork exercise with DVLA to change and get the extra weight. If you want to re-classify the tax then you have to change at taxation time and have it changed to a PHGV. Tax is cheaper.