Nov 7, 2025 | 06:44 PM
  #1  
Has anyone on here had any issues with the gts5 racechip? When I installed it I immediately get a cel and limp mode. I put the test chip in the harness and removed the gts5 everything worked great so the harness and connections are fine. They send me a new one I plug it in and it gave me limp mode only no cel.

I called them and they tell me my parameters set by mercedes are too tight and the gts5 wont work on my car. If this were the case it would have an out of limit code which it doesn't. It has a no communication code which tells me the gts5 has an open circuit somewhere. So at this point I am just going to purchase a whole new one which will be #3 and fingers crossed it works.

Anyone else have any issues?
Reply 0
Nov 8, 2025 | 01:43 PM
  #2  
Zero issues and close to 1500 miles on it....
Reply 1
Nov 8, 2025 | 04:48 PM
  #3  
No issues either, other than I got a low engine oil warning, not 100% sure if that has anything to do with the RC tho
Reply 0
Nov 9, 2025 | 04:26 PM
  #4  
Thank you both! Hopefully when I get #3 that will be the one that works
Reply 0
Nov 10, 2025 | 07:59 AM
  #5  
IM me please to discuss.
Reply 0
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