I just installed the Green filters yesterday. It was extremely simple. With the 2005 SLK350, you do NOT need to remove the coolant hose that attaches to the passenger-side (on USA/LHD vehicles) air intake. Just leave it attached, and detach the air intake hose from the air intake box (on the rear engine cover). I detached the hose by pulling it off the air intake box on the rear engine cover, rather than the end of the hose toward the nose of the vehicle.
And yeah, the whole thing takes about 10 minutes. The hardest part for me was getting the rear engine cover back on properly. I just had to fiddle with it for a bit, but it's pretty simple.
I also had quite a bit of build-up in my intake. There were whole bees packed in with leaves and dirt, pine needles, etc. It was like a pancake of crap shoved in my intake. I shop-vacced it all out, and replaced the filters. Oh, and the fact that my car swallows bees whole really gave me a laugh for sure. I think I might name her "Medusa."
I have definitely noticed an improvement in performance. The car revs freely and much more quickly now, I probably gained 0.3 secs on a 0-60 run. I mean, I can seriously scream through the first 3 gears in about 2-3 seconds flat (and I have a manual).
Haven't driven it long enough to check gas mileage, but I do notice an improvement on the cluster. My last tank averaged 18.5mpg in mixed driving (I like to play sometimes). Will update with new mileage when I have it. |