I have two 86 300SDLs and I can safely say that you will love the car. If there is not a rust problem and the ACC works as the ad indicated, there is one more thing to worry about, a cracked head.

A certain percentage of the 603 engines have the problem, I've heard 20%. The 87s were more prone because they came with a trap oxidizer, many of them failed and overheated the engine, causing heads to crack. The "14" head is the one you have to worry about. You may know all of this so I'll stop the rant.

With the price you paid you are in a win-win position. You could part it out and double your money, or give it the TLC and have one of the best cars ever made.

Good luck.
Harry