I am considering an S Class purchase and have narrowed the choices down to a '90 to '91 SEL or a '92/'93 SEL. I am looking for other members with these cars to give their opinions on the differences in the two models and what are the usual parts or systems that need to be watched for when doing a pre-purchase inspection.

Any mechanical worries that typically come with these models?

Appreciate any helpful insight into the reliability of these models.

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Eric
'88 300E
'00 Expedition
'86 Alfa Romeo Spider
'84 Harley Davidson FLH"X"
Special Edition
'70 FJ40 Land Cruiser (basket case)