Hello, I bought a new to me Mercedes 1981 300SD with the broken odometer stuck at 175,000 miles. The engine was the cleanest external engine I have ever seen. The car had been sitting outside for 5 years. It started and drove onto the trailer with no issues. I am now starting to fix problems after a 30 day lien sale.

Here are some problems:

1. Starts OK but seems like it's not hitting on all cylinders but starts and clears in 30 seconds then idles fine. After it warms up #3 starts to fall off and the engine rocks pretty bad with a small amount of blue smoke out the tail pipe. I can "tune" the shake out by cracking the injector line and bleeding off some fuel just before it goes to full miss opening the line completly. Open all the way it rocks and closed with full fuel to the injector it rocks. I am thinking a DV problem??? This is the smoothest sounding 617 motor(after 1000rpm) I have ever heard.

2. Under full boost I get a squeel from the right side of the engine. It sounds turbo related. I ran it with the EGR off and the sound stopped. Then I put a egr block off plate in and the noise returned. It has good power and I pulled the u-tube to watch the turbo and it looked and sounded fine.

3. There was a large amount of new clean oil behind the driver seat in the carpet. I would say it had to be a quart or better. It almost has no smell. The car also had a new driver seat that matched well but had a different seat belt attachment. I replaced the seatbelt and it all fit fine. I can't figure out where the oil came from. I pulled the rear seat to see if it was fuel but it does not look like it came from that area. I am thinking it had a quart of oil in the rear seat back storage and it leaked?

4. The turn signals won't cancel both directions and I hope they are just stuck and need lube.

5. Last major issue is the lower wiper blade is loose and follows once in a while most of the time it stays down.

This car sat in the sun so the paint is done and the pretty plastic inside snaps with a gentle breeze. That is the west coast version of rust. Someone had removed a few pieces of the carpet in the interior and left them on the package tray turning the blue to a golden blonde. The package tray has a fine layer of golden powder fuzz that was once blue.

Those are the initial problems that I am going to deal with.

So far I have:

Done a valve adjustment, nothing too abnormal found.

Changed the oil, installed a new group 49 battery, new tires.

Drove it 15 miles. The brake calipers need work(cleaning) and the system needs flushing.

Other than that it's great! Oh! The center vents work!

Any thoughts and advice are welcome.