Very busy weekend. First off, got the SLK55 4-pot front brakes installed. Here's what I started with, the SRT-6/SLK32 AMG brakes:
Here's a view of the two calipers. The 4-pot caliper uses a smaller brake pad. Added EBC Yellow Stuff brake pads while everything was apart.
Drilled the new offset rotor retention bolt in both hubs. Here's a view of the difference between the R171 and R170 retention bolt locations:
As an engineer myself, this kind of stuff aggravates me. After this, the caliper and bracket bolt onto the car. Brake line fits. Only needed to eliminate the pad wear sensor cable, as there is no spot for it on these calipers. Other than that rotor retention bolt hole, the entire thing bolts together.
Here's what it looks like installed.
A 5mm wheel spacer was required to clear the SRT-6 wheel. This, combined with the thicker rotor mounting hat combines to about 6-7mm. This presents a new problem, in that the stock lug bolts now only have about 5mm of engagement. Ordered 10mm longer lug bolts, which arrive Monday.
Moved onto a host of smaller projects, including some underhood cosmetics. The plenums were painted black, the upper radiator support was removed, sand blasted, and painted (awaiting reinstall). More importantly, the SLK55 seats were completed. I will describe these in detail in the next day or two, but suffice it to say, they're way nicer than the stock Crossfire seats! Everything is working on them, except Airscarf, which I have plans for over the winter. I need the mating electrical connectors for those, if anyone out there might have them.