Hi everyone.

I bought a 1983 300d turbo recently and took it into a local mechanic to do a full inspection. I have a friend who knows these cars well but he's currently MIA so I'm looking for a second opinion on the mechanic's quote.

Car has ~209k miles, a/c and cruise control. Overall drives well (with quirks of course).

I told the mechanic I'm currently interested in only doing the most pressing things to make the car mechanically sound, to which he came back with:

- needs injector pump rebuilt oil cooler lines $950
- driveshaft rebuilt $1300
- differential noisy tie rod and drag link $400
- alignment $70

My crappy observations about each part:

injector pump
Idling at a red light is sometimes a bit rough; car rocks a bit back and forth at times - not severe at all.

Oil cooler lines
Lines are sweating oil and it's leaking a bit where the lower lines meets the oil cooler. Seems like this should be fixed pronto... Just concerned about the price.

Driveshaft
I know this item could have its own thread... I'll try to keep it short.
I get moderate to severe vibration accelerating at a slight incline in the 30 - 60 mph range. It's a deep resonance. Before 30 mph, no issues. Over 60 mph, no issues. The vibration depends on how much I put my foot down in these situations. If I ease up on the accelerator enough the vibration goes away.

During the same mph range if I'm decelerating I get a mild constant vibration.

Regardless of acceleration or deceleration, switching into neutral completely quells any vibration.

I don't feel any vibration in the steering wheel, and maybe a bit if any coming through the shifter. Feel it all through my seat.

Differential
I just know the back end of the car is noisy going over bumps.

Tie rod and drag link
Don't know.

Ye masters, please share your knowledge!