That limit of £500 is unrealistic, but replacement windscreen cover is a neat scam firmly locked in between 2 of the well known providers and the insurers.
On the Mercedes CLC the panel between the glass windscreen and the glass roof is considered bodywork, and not covered by the windscreen cover. On many policies the glass roof is also not covered.
If the car has a heated screen de-mister I suspect that to replace it with an unheated screen would result in an MOT fail, if they actually checked.
Perhaps a simple load on the circuit so the warning light comes on correctly would work....!
If you insure next time with Gott and Wynn they cover the work carried out by a Morgan dealer, using factory parts.
