Changing the water pump on my '91 300CE with the M104 motor. I have everything out of the way, and I think 3 of the bolts are fairly accessible (There are 4 bolts, right??), but I can not figure out how to get to the top rear bolt. It's a 13 mm bolt and I have a 1/4 & a 3/8 13 mm flex socket, but I cant get to it. It sits right under the intake manifold (which I really don't want to remove!). I can't even see the thing w/o a mirror!

Any help?

Thanks, Ryan

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RG Newell

1984 300D
1972 250
1986 560SL
1991 300CE