Update: Dealer Repair Completed — Am I Being Overcharged?
Rather than burying the update in the original thread, I thought I'd start a new one and link back for context.
I'm curious whether others have seen similar repairs and whether these charges seem reasonable.
Here's the original post:
The 2020 GLC300 was repaired by the dealer, and according to the invoice, the root cause was addressed under what appears to be a Mercedes service bulletin/campaign.
Customer complaint:
- Check Engine Light illuminated
- Vehicle would not accelerate properly
- Engine stumbled/shuddered when stopped
- A CLIENT STATES: CHECK ENGINE WARNING LIGHT ON AT DASH, WILL NOT ACCELERATE, WHEN AT A STOP VEHICLE STUMBLES
- CAUSE: 541011 PERFORM QUICK TEST 350182 W (N/C)
- 476970 FUEL SYSTEM CONTROL UNIT REPLACE (AFTER CHECK) 350182 W (N/C)
- 547989 DISCONNECT/CONNECT GROUND LINEOF BATTERY FOR 12 V ON-BOARD ELECTRICAL SYSTEM (DURING REPAIR OPERATIONS) 350182 W (N/C)
- 1 000-545-01-41-64 EXCHANGE DIAGNOSTIC DEVICE
- G** SOFTWARE UPDATE NEED IT FOR CONTROL UNIT
- 55MBZ SOFTWARE UPDATE 350182 C
- G** SOFTWARE UPDATE NEED IT FOR CONTROL UNIT
- 55MBZ SOFTWARE UPDATE 350182 C
- Two separate software update entries were listed, and I was charged $325 for the software update.
- The Service Manager told me Mercedes charges separately for software updates. My response was that this seems ridiculous if a software issue can cause the vehicle to go into limp mode, illuminate the check engine light, and require repair. Why should customers pay to correct a software problem that originated with Mercedes?
- Has anyone successfully challenged a charge like this with Mercedes-Benz USA or the dealership? If so, what was your approach and what was the outcome?



