Couple of Question about 1978 300D

[hippie_elmo]

Just got my 1978 300D back from a major tune-up. The repair said that I needed to replace the

1. Drag link and stearing shift. What is this? What is the cost of this?

2. Two engine mounts. Do you have to pull the engine out to do this?

When I trun the key to "2" to warm the glow plugs the light goes off in 2 seconds. The reapir person said that it could have been replaced with a new grow plug relay that warms them very fast. Is there such thing?

Thanks for all your help,