If you can, do that. Slow down and get on top of the job. You are in an oily mess now and that will have to be cleaned up, both on the ground and in and around the engine. First of all, the way the Benz people want you to pull that engine around is from the front crankshaft pulley/balancer bolt, way deep inside that pulley. But in order to get your cam shaft to the right position doing that is a two person job, because one person has to lay on the ground and turn the1/2 inch ratchet(and it is hard to turn!) and the other person has to watch and locate the cam position.
Secondly, you can bump the engine with the starter from the passenger side fender. There is a little black box right along the inner fender edge with a top about 1/2 inch wide X 2 inch long. Unsnap the top and it is open. In the box are three screws. Using a needle nose pliers, touch the top of the little screw with one point of the pliers and the end big screw with the other. Do it carefully and you can nicely nudge that engine into any cam position you need. To make it easier, you can get a little push button starter switch at any Parts House and very easily wire that too those same screws. It makes it very easy.
Also, from that position you" by pass" the glow plug system and that is where you made your mistake. You energized the glow plugs and sure, it fired up. If you would have read and studied just a little, you certainly would have known to (at the least) disconnect or unplug the glow plug relay at the front of the drivers fender.
Remember that accidents don't just happen. People make accidents when they don't understand the system. Sorry!

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Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!