Thinking back since my first new Merc, in '72 and quite a number since then..
all the older cars had wheel GUIDE PINS IN THE TOOL kITs So there must be plenty around in the wrecked Cars Over to you Styria and Mark ???
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Sean, genuine ones are quite difficult to come by. I think most owners didn't know their application. You see very few about. Benz Boy has found some great Internet Choices and Pete also has a great solution by purchasing hardened bolt(s), grinding off the head and cutting a slot into the head of the bolt.
I do have the correct Mercedes part in my tool kit that I put together with the help of Parks. However, usually it's hidden in a drawer and not always close to hand. The 18" Taiwanese wheels on Gleaming Beauty, whilst fantastic in quality, are very heavy - the proverbial ton for each one. In my present physical state I am unable to lift them into place so that I can fit at least one locating bolt. However, I have found a way to overcome this. Prior to attempting to offer up the rim , I lean it against the hub and then lower the car into position with the Mercedes lifting jack until both units are the correct height in relation to each other. It is then fairly straight forward to push the rim against the hub, line up the holes and insert the wheel bolt. That's my way of doing it, if I have to. Hope that helps. Regards Styria
N.B. Talking about jacking up 6.9s by means of the Mercedes lifting jack - it can be quite dangerous as I have known cars to move forward or back unless the wheels are chocked with a piece of timber or the genuine chocks available from Mercedes and also part of the tool kit. The design of the lifting jack is diabolical and downright dangerous. Worst design I have come across. Early models of the "60s, particularly the 300s (Finnies) did in fact have studs to which the wheels were offered up to and then secured by wheel nuts.