One of my books said your car should do 0-60 in 10.0 seconds.

A word of advice--don't rely on a stopwatch and speedometer. Stopwatches are difficult to trigger just right, and speedometers can lag in response, as can your attention.

Fortunately I have a G-Tech accelerometer which is an amazing little toy. It is also surprisingly accurate in its measurements--though nothing beats a drag strip and a dynomometer.

When testing 0-60 and 1/4 mile, you must "launch" your car. You can do this with a manual or automatic transmission, and it's even better with turbocharging. If you have an automatic, just power-brake then car until boost builds up a little, then simultaneously release the brake and floor the accelerator.


For tuning, I'd first check the boost pressure using the factory recommended procedure. If it is low, track down any possible causes such as a leak in the intake tract, a faulty EGR valve, a clogged exhaust, etc.

If everything is good, increase boost pressure manually. A factory manual is priceless here (not a Haynes book).

Your boost compensation (if adjustable) may not need any tweaking, save it until everything else is done.

A little disclaimer--I'm obviously not a Mercedes-Benz expert. However I am a technician with training for other car lines, and I am a speed-freak of sorts.