1991 Mercedes-Benz 350-Class Consumer Review: Excellent car. Beware the 603

1991 Mercedes-Benz 350-Class - Consumer Review

Average Consumer Rating

17 Total Reviews

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Build Quality
Reliability Value
Excellent car. Beware the 603 engine
By blondtraveler on


1991 Mercedes-Benz 350-Class 350SD Turbodiesel 4dr Sedan


The 350SD is a very nice car. I have had several reliability issues including a power steering pump that broke off, and oil cooler failure. The 603 3.5L diesel engine originally had weak connecting rods and was one of the shortest-lived diesel engines that Mercedes has made. Many of them had their engine replaced before 50K miles. With updated connecting rods this is one of the best diesels on the road.

Best Features

Classic style. Great interior. Runs B100 biodiesel. Good performance, great comfort, good mileage. Very easy to do oil changes and other routine maintanence.

Worst Features

Better reliability. Parts could be less expensive and easier to find.
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