Need advice on purchasing a W124
I'm looking for a 89 - 93 300E. I'm forced to sell my current car b/c of insurance reasons, and I need to buy something before Dec. 5th as a temp. car to use for about a year until my premiums go down. I have a couple questions about 300E's.

Was the 24V 3.0L engine ever in the sedan, and if so for which model years & models?

What should I be looking out for when looking at a 300E - are there any areas that generally tend to be troublesome? (i.e. Head gaskets?)

Which model year did they replace the M103 with the M104 engine?

Does anyone have a list of updates that 300E's received b/w '89 and '93?

Thnx

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Prash