Mercedes CLA engine stalling at idle

The symptoms you describe combined with the error code do point to a potential issue with the idle air control valve A contaminated intake is a likely culprit Have you checked for any obvious air leaks

Air leaks How would I even check for those Is that something I could do myself or am I better off just taking it to someone who knows what they are doing

Checking for air leaks can be tricky without proper tools Given the stalling and error codes a professional diagnosis is advisable It does sound like a faulty air valve or related issue The intake contamination is probable A workshop can properly inspect the throttle body and air valve

Thanks for the advice Took it to a workshop and you were right It was the idle air control valve and a filthy intake Cost me 425€ to get it sorted but at least it is running smoothly again Appreciate the help