Lego Mercedes 190SL repairs

I haven't yet done much with my Mercedes sports convertibles. The example above was missing a bumper end, which was replaced by a part cut from a piece of chassis kindly provided by a generous fellow-collector.

These little cars are most often broken and incomplete, missing headlights, steering wheels and with windscreens broken off. Little that can be done to repair them, short of reproducing those parts.

The Mercedes 190SL is assembled so that the interior is glued to the chassis, while holding down the body which is otherwise loose. The windscreen (broken off above) has a wide flat stem which is glued to the front of the interior, and the steering wheel is glued into the dashboard.

There isn't a real reason to take one of these cars apart and it is far from easy to do. I managed to slip the body off the one above from around the interior, because I wanted to see how the windscreen stem was shaped. That's as far as I've come at the moment, while figuring out how best to proceed.