You need to drive specific drive cycles to get the monitors to run. BUT you may want to have the car scanned with a MB specific scan tool. There are trouble codes that can be set that do not light the check engine light but can prevent some tests from running as well.
The three items you mention are ones that should run very rapidly.
Here is a somewhat generic drive cycle as an example
Begin with a cold start (coolant temperature below 122 degrees F and the coolant and air temperature sensors within 11 degrees of one another). This condition can be achieved by allowing the vehicle to sit overnight, and then by beginning the drive cycle the next day. Most drive cycles will be difficult to follow exactly under normal driving conditions, so the driver should exercise caution, road safety, and courtesy to others.
* Start the engine. Idle the engine in drive for two and a half minutes with the A/C and rear defroster on.
* Turn the A/C and rear defrost off, and accelerate to 55 mph at half throttle.
* Hold at a steady speed of 55 mph for three minutes.
* Decelerate (coast down) to 20 mph without braking or depressing the clutch.
* Accelerate back to 55 to 60 mph at throttle.
* Hold at a steady speed of 55 to 60 mph for five minutes.
* Decelerate (coast down) to a stop without braking.
Repeat all but the cold start twice.
Wednesday, March 22nd, 2017 AT 11:43 AM