The OP has my sympathy and also my thanks for highlighting this issue, also thanks to those who've contributed. As a member of Jo Public, my understanding of modifications was changes post factory. This thread prompted me to read my policy documents carefully. I'm with Admiral and they define mods as anything different to
"standard" specification, i.e. factory fitted optional equipment is a modification. Cue brown trouser moment
the big AMG wheels and AMG bodykit are a bit of a give-away.
Like many I use comparison websites. Moneysupermarket says mods are changes from
original specification - which is what I thought mods were. However GoCompare uses the same language as Admiral, changes to standard, i.e. basic spec. Without this thread I'd probably have not distinguished between
original and
standard thus risking being uninsured.
As others have mentioned, knowing what was an option on a used car is semi-impossible. But I'm not one to be defeated and more importantly uninsured, so used a VIN decoder, the owners manual, a 2010 catalogue found online and a 2009 pricelist from EBay (no 2010 available) and cross referenced everything to get a surprisingly long list of options. I'm probably in a handful of people who are mad enough to do this.
I was very concerned that specifying all the options would massively increase my already substantial premium. I needn't have worried - £12.86 premium increase plus £9.50 admin charge as I did it online.
But the issue remains. A lack of consistency online and between insurers, how to establish what features were options and in particular using the word modifications to include optional equipment. To give an extreme example - who would consider optional metallic paint as a modification ? Reliance on insurance companies to be reasonable in their interpretation isn't something I'm comfortable with.