Create a one-page input sheet before requesting prices: registration details, exact variant, registration location, policy expiry, previous claims, earned NCB, chosen IDV, voluntary deductible and the same add-on set. Attach that sheet to every quote. If an insurer changes an input, mark the change beside the premium so the apparent saving is not mistaken for a price difference.
For each add-on, write one loss scenario in plain language and then read the trigger, exclusions, depreciation rule and claim limit in the wording. “Engine protection” may sound relevant in a flood-prone area, but the name alone does not show which water-ingress circumstances or consequential damage are covered. “Return to invoice” does not mean every major repair becomes a total-loss payment. The schedule and wording—not the sales label—decide.