I just finished installing mirror finished stainless steel roll bars in my SRT-6 Coupe made for 98-04 SLK230 Roadster(R170). Can't tell them from crome and much bigger diameter and heavier than the factory roadster roll bar. No taps that show! I had ordered 4 factory roadster gromets and they were so tiny I took them back to the dealer. The roll bars came with a stainless plate and cheap looking gromets. Didn't use either. Don't use the stainless plate that comes with the bars for a template pattern. (It's not accurate!) I't took me three cardboard patterns before getting my pattern perfect. Just have to use a 2 9/16 hole saw to drill 4 holes thru the removed plastic cover that caps off the wall between our seats and trunk. I don't even need cover up gromets but I came up with a much more stylish tapered gromet that's a perfect pipe diameter fit. If you take the lid off a toilet tank. Look inside and in the middle you will see the one inch overflow tube that has the flush flapper attached to it. This flush assembley has a tapered neopreme seal thats (inside) the tank that you can hardly see because of the flush flapper seat. You can buy these neopreme seals seperate at plumbing supply for $1.50 each. Not to be confused with a thick ugly spunge rubber spud gasket that goes (outside) the tank between the tank and bowl. No metal cutting anywhere whats so ever or any bending for mounting the bars. Wiggle them in from behind the seat only. They will hit the head liner if you try installing from the trunk.The 4 bolt mounting holes are already factory drilled into our coupes on each side and there is a bottom stop for them to rest on. Had to buy eight washers and eight bolts #8 metric one inch long. Ten pounds free shipping weight. I've seen the same part number on E-Bay for $249.00. Bought mine on E-Bay thru Autogrimming.com for $149.00 SKU number> RB-SLK Squirrel Crusher