Hey guys. My car’s been sitting for quite some time now because it was facing some leaking issues but, recently I managed to resolve it by replacing the vacuum pump, oil separator and cam plugs (common issues). Not long after, the battery died so I had that replaced as well. Now that the car runs, I did a quick scan using my Autel MK808 (first time using) and found these errors (file attached). I was wondering if you guys could help identify which codes are critical and require immediate attention to? and which codes can I just clear (if okay to do so)? I was thinking since I’ve just replaced the battery, I could just clear the low voltage codes but please correct me if I’m wrong.

P.S. Sorry if I sounded newb-ish, I’m still learning 😁

 

I would clear the whole lot and see which ones come back...

 

I see. After clearing the codes, do I take the car out for a drive first before diagnosing or do I simply turn the car off and on again?

 

You can do it in stages if you choose..

 

Alright, I'll try to clear the codes and come back with updates. Thanks Alec.

 

Quick update. I’ve cleared all the codes as you suggested and ran the diagnostics 3 times just for the sake of it. Surprisingly none of the fault codes popped up on all 3 attempts. This may seem like good news but my guts are telling me this is too good to be true.

What should be my next step?

 

Update #2

Drove the car around the block and in the middle of driving, an error popped up: “EBV, ABD, ESP inoperative. See Owner’s Manual” and “Run flat indicator inoperative”. Searched through the forum for a similar issue and tried the different methods they suggested but nothing seems to work.

Brought the car back to the garage and while the engine is still running and the error lights still showing, I connected my scanner to see what faults it would read. I’ve attached the results from the diagnostics.

I read from this thread (link below) of someone experiencing the similar issue (reply #7) and his/her conclusion was a faulty ESP control unit which correlates to the results of my diagnostics. Seeing how expensive the replacement cost is, I’d want to consider that as my last option. Hoping someone could help me with a solution.

https://mbworld.org/forums/c-class-w...unit-w204.html

Regarding Error Code 0521 “The charge movement flap (cylinder bank 1) is faulty.”, I’m assuming this requires me to replace the intake manifold, correct?

Thanks in advance for all the help.

 

You can use parts from eBay as long as the p/ns match exactly.
Is that a C280 CDI ? OM642. or an M272 petrol ?

 

Alright, I'll try browsing through eBay. Btw, It's an M272 petrol engine.

 

https://mbworld.org/forums/e-class-w...lfunction.html

 

Yes, I've read through this thread before. Heard a lot of people encountering the same issue suggesting that the flap mechanism might be broken. I've inspected said flap and it seems to still be intact. Some suggests that it might just be sticky due to oil build-up, so I think I'll try to clean it and see if it would budge. Either way, I think replacing the flap mechanism to the Aluminum version as oppose to the factory plastic one should be a good move right?

 

Since it appears to vacuum actuated you might want to check the hoses.
The position hall effect sensors are at the rear of the engine.