I agree with the previous comments about the age of car and not the miles driven as contributing factors in failures of certain engine parts.

When I bought my 88 124C/103 four years ago, it only had 41,000 miles on it.
Nothing at all for a 13 year old car. But a PPI revealed a leaking head gasket (yes, at the rear of the head, external only) which was replaced at the time.

A year and a half later (at 55,000) valve seals replaced to cure heavy oil consumptiion.

I can't compare the engines. But I have no gripe with my 103. Trouble free car. Get in and Go.

Parting thought: Consider a coupe or cabriolet if your single or getting a second car. Rare bird and dynamite looks.