The SLR is the collaboration of McLaren and AMG which Mercedes thought should be more SL-like and McLaren thought should be more track racer. Finally, a forum for this misunderstood unicorn! One of the 2nd generation of Mercedes-Benz Supercharged vehicles which includes the '32' M112K V6, and '55' M113K V8 series in multiple chassis and this supercar M155 V8. All have 3-valves per cylinder, overhead camshafts, port fuel injection, two spark plugs per cylinder, and compressed air/water intercoolers.