How's the car run?
If it's running well and getting around 13 sec 0 to 60, I'd leave the injectors and alda alone. Unless you are having leaks I would leave the seals alone too. Same deal w/ the alternator brushes.

Motor mounts, engine shocks, subframe and rear diff mounts? Don't forget to take a look at the flex disc.

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82 300D....went to MB heaven
90 350 SDL....excercising con rods