Hi there,
We still have the ML63, but we're planning to do frequent 560 mile trips, so we figured it was time to get a mile muncher. So, we added a 2009 CLS 320CDI to our fleet.
Someone I bought the car from mentioned that it can be a little of a stutter if you're not careful, but that it'll be alright if you're heavy-footed, haha. I knew I was getting a problematic kid since the price reflected that. Everything is fine.
The issue:
Once warmed up, the car isn't a fan of light footing; doing so causes it to jerk and hit fuel cut. However, you can feel it turning on, and with a reasonable amount of power, it blasts through without jerking. When it's warm, it despises light throttle.
My accomplishments thus far: – After applying Stardas, I received code 2616-02. I viewed the live data and noticed that the b60 sensor reads approximately 1 bar at idle, which climbs when boost ramps up, as anticipated. This being said, I went ahead and replaced the sensor with a new one. Up until the car warmed up, it solved the problem... huh.
- Checked the intake pipes for air, discovered a split in the MAF pipe at the turbo connection, sealed it with high-temperature silicone tape, and replaced the orange gasket that had chips.
- After inspecting the actuator, I can confirm that it operates at 90% at idling and decreases as expected across the rpm range. The actuator appears to be operating as intended. Observed and verified using Stardas real-time data.
Various other findings:
I don't think the turbo blades ate the gasket because there is very little flexibility in the shaft and no traces of burnt gunk; nonetheless, the blades do exhibit wear and are far from flawless. I have 137k miles on my automobile.
The vehicle still shows code 2616-02 and stutters under mild acceleration; it almost seems like it has stopped boosting correctly; it drives like a NA diesel; and only when you apply more throttle does it accelerate like a dream.
I'm going to try connecting a 4.7k ohm resistor to the swirl flaps connector to see if that fixes it. If that doesn't work, I'll probably look at the actuator's electronics and physical gears.
Apart from that, the car is in excellent shape; no other codes have come up, it pulls strongly and hesitates at full throttle. I can replace the matched actuator and turbo if necessary, but I'd rather check everything on my own first.
Do you have any suggestions, fellow Mercs?