Hood (soft top) Problem
There is a design fault whereby the metal mechanism rubs on the hood material and wears it away every time the hood is put up and down. If ignored this will eventually result in the metal mechanism arms piercing through the hood material.

Indication/Tell-Tale Signs
A silver arc on the inside of the hood near the rear top corner of the window glass, see photo below:

Prevention
Stick additional material on the inside of the hood, as in photo above.

Front and Rear Wishbones
On Series 1 M100’s (1990 – 1992) the suspension components were painted from new but not covered with Dinol wax.
After 2 years when it was time for the first chassis wax treatment, rust had usually occurred and the paint offered very little protection against the spread of rust resulting in whole sections of paint being lifted. Unless the loose paint areas had been treated, the wax had no effect as it lay on the loose paint and water could penetrate and continue the rusting process.

The rear wishbones lower face is particularly vulnerable and in extreme cases can result in complete perforation. When the Series 2 (1994-1995) was introduced the rear wishbones were galvanised.

The front wishbones seem to be less prone to serious corrosion but the paint still lifts and offers very little protection against corrosion. This part has not been galvanised on Series 2 cars.

Below are a number of photographs of an UK G registration 1990 front wishbone that had been wax treated at the required intervals, the photographs were taken in June 1999.

The rear wishbones were completely perforated and unfortunately not photographed.

Water in Footwell
There is a bitumenised/painted foam union that is cable tied between the cold air inlet (that is molded into the top of the LH wheelarch) and the heater fan box inlet.

Over time the bitumenised/painted surface or the foam cracks and allows rainwater to penetrate from the base of the windscreen by the bonnet/hood hinge into the passenger footwell (RHD vehicles) via the heater fan inlet and fan box.

The union can be accessed by removing the passenger side (RHD vehicles) wheel and wheel arch cover.