If it's a 6 cyl, the engine will be either an M103 - single overhead cam or M104 - double overhead cam. I want to say the M104 rolled in around '92, but I could be wrong.

My '91 300-SEL has been with me since '97 - has the M103 motor - just a slightly larger displacement for that size car. Be it 2.6 liter or 3.0 liter - both are the same as far as I am concerned with regards to maint. and upkeep, etc.

The M103 is reliable, but can become an oil consumer for a number of reasons. Fairly simple to maintain as MBs go. I would imagine the 190E to be the same.

Just my 2 cents.

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Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"