Acceleration issues
 

When I accelerate hard the car almost studders and jerks when shifting down from a higher gear I had this issue in my vehicle mk5 was a charge pipe but I have read man different things it could be on these forums it's a 2014 Mercedes cla 250 44,000 miles always serviced I don't want to take it to the dealer ship and not be able to replicate the problem I did just install a AEM intake on it within the last week should I start with plugs, injectors hoping it's just the charge pipe is lose or something simple any suggestions?