Browsing the net and looking at details of various cars, I realised I couldn't recall all the advice you've given, so I've gone back through and pulled out what I think is most important info for us at the moment. Accepting that some of these are clearly swings and roundabouts, we need to consider:
L, LH Jetronic and Motronic - improved power and economy over carbs and K Jetronic (question - how will I know what injection system is in any car - is it by date?);
Avoid smaller engines (ie 2.0) as they are underpowered, less mpg and wear out - go for 2.3;
Later 240s have better rust protection (any idea what date this started?), and avoid significant signs of rust below tailgate and behind rear bumper, this can be a sign of expensive rust further down;
If manual, try to get overdrive for better ride and economy; 5-speed better still as no overdrive to go wrong (I think I read that elsewhere) but they can get noisy after 200 000 miles (question - do some autos have OD? I see that's what's written above);
Avoid post-1991 (J-reg) as the cat saps power and economy and can be expensive to replace;
245GLE/GLT looks a good match to our needs (tho the 'T' could be expensive for insurance for him).
With those pointers in mind we have something like a target car in mind, and can work back from that according to what comes up for sale. Any corrections very welcome!
Thanks.
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