Someone had their own idea of how to treat this car. There is no reguard for authentisity or the car's intrinsic value. i'll double check the picture, but it shouldn't run. The white fitting on the end of the vacuum hose to the brake booster is not plugged into the booster, it should be black, it should allow air to be sucked into the manifold. I'd be very afraid of this car and expect to be disappointed at every repair/ refurbishment step because so many original parts have been removed, replaced with non mercedes things, and things put back it wrong places.
Of course, you knew it was hacked and thus many thousands under priced for an un-hacked car, so sit back and enjoy what it is and what it has left to deliver. If you are serious about digging into what is wrong with your car with the idea of correcting them, wow, you are goinfg to spend far more than if you had paid up front for and un-hacked one.
Its not just the parts, its the fitment and the labor hours that goes into working on a hand made car. These cars were custome hand fit. Every little detail is time consuming. if you want the car to work right. You can spend 3 or 4 days just getting one door and all its individual components to work as it was intended.
Have fun with it and don't get serious, unless you are retired with disposable income. Sorry to be blunt, its just hard to look at what someone did to one of the prettiest girls at the prom and not feel sad for her.