I have owned both a 123 and a 124 and have covered many miles in each. I agree with everything mentioned about the 123 so far.

However, from my experience, I would have to recommend the 124 if you are driving long distances on a regular basis. The 124 offers a more refined suspension for those rough roads, ABS, ASD (locking rear diff.), airbags, and a much....much....much more comfortable driver's seat with 8-way power adjustments and optional heat. Additionally, I seem to remember getting mileage in the mid 20's per gallon on the 123. With my 124 (2.5 turbo) it is common to get in the mid 30's.

The initial purchase price for the 123 might be less than the 124. However, it has been my experience that my '92 300D has needed very little work on items which have failed due to age. I mostly replace normal wear items. I was replacing the "aged" items in addition to the common wear items on the 123.

Both are fantastic cars up to the job you describe. You can not go wrong with a good example of either. The car for you depends on the features for which you are looking.

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1996 (W210) E300D 86K - Traded in for a Lexus
1992 (W124) 300D 2.5 Turbo 202K - Sold
1983 (W123) 300D, 146K - Sold
1970 280S, 263K - Sold - Beginning of addiction