” ...Brought in my 2004 CLK500 and it turned out 2 of the 4 cats were going south. Fredy nailed the diagnosis right away, walked me through what was going on, and got it sorted without any major runaround, It took 48 hours to findm order the parts and install. If you care about your car and want someone who actually understands how things work, not just throwing parts at it, this is your guy. Highly recommend. ”