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Greetings. Im about to install a new rear differential on my 2015 GLA 4matic Do i have to do any programming work on it or something?
 

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Sounds like a dealer question to me. I doubt it's a theft-relevant part (especially since it looks like you are replacing it away from the dealer), but I hear you on maybe being VIN coded, and that I'm not sure.

Dealer should sort you for that inquiry tho, I would imagine.

Sorry to not be more helpful than that.
 

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I had my rear differential fail on my 2015 GLA45. Had it not been covered under my extended warranty it would have been an $6-8,000 dealer only job.

The dealer told me the the center differential is rear mounted and part of the rear differential assembly. This assembly utilizes a wet clutch system with a built in computer that required dealer specific programing to operate with the ECU.

So if the GLA250 uses the same system (less the AMG re-engineering), you may be forced to have the dealer source and install the required programming.
 
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