For the W210 most 96-97 driver side mirrors aren't self-dimming and appear to fit the case. For the W202, it's possible non dimming mirrors from '94 to maybe '97 fit the case. As well for the interior mirror. An option for the interior mirror is to block the light sensor. I don't know where it is if it isn't an obvious lens in the mirror surface. A really quick option for the driver mirror is to get a generic and likely optical distorted mirror from an auto parts store to stick over the failed dimming mirror. It can be a stopgap while investigating a mirror from an older W202.

Sixto
98 E320s sedan and wagon