waisoserious

Does anybody know if the X253 GLC43 SUV and the C253 GLC43 Coupe are able to use the same Piggyback ECU Tune Units (Dinan, Racechip, BMS JB1, etc...)

I am extremely interested in adding a piggyback to my 2017 GLC43 Coupe, but most tuners only list the SUV and I cannot be sure myself if the units for the SUV and Coupe are the same.

Racechip's USA website itself has a tune listed for the GLC43 Coupe but Racechip Euro/Germany websites do not list a tune for the GLC43 Coupe (only SUV). However I emailed them and the support said that this is an error and that the GLC43 Coupe tune is indeed available. But when I emailed them back asking how to order, they stopped replying?!!?

In truth, I do not want to buy directly from their website since most of Racechips Authorized dealers sell for much much cheaper. But since I cannot confirm myself if the SUV and Coupe GLC43 use the same units and wiring, I am hesitating to pull the trigger.

Anybody shed some light?

What about the GLC43 SUV/Coupe vs a C43 Sedan/Coupe? Should the piggyback units be the same as the C43 as well?

subzero05

the piggyback should be the same on the C43 as the GLC 43 in terms of the sensor connections and what not. My guess is the MFG has not seen a GLC 43 coupe to verify the wiring harness , location of sensors etc. therefore hasn't listed it for your model. In the case of say Dinan, I bet this would be the scenario. might want to call or email them. If you are in Taiwan, I know Dinan has a distributor over there called "Large Distributiing", how ironic of a name huh!

MB-350

C43, GLC 43 and GLC43 Coupe are the same. You connect it to the same sensors. I guess also the software on the piggyback is the same.
But I don't get it, it is on the website !?: https://www.racechip.us/shop/mercede...-384lb-ft.html

waisoserious

Its not on racechip.com or racechip.de though lol

DameMD

Most of the tuners that you mentioned do not have the GLC listed, maybe due to the fact that majority of people will be purchasing the tunes for the C43 -coupe/sedan. This same question has come up plenty of times in this forum.

I had the Dinan Sportronic tune that was listed for the C450/C43, and the GLC43 was not listed. I followed the instructions on the Dinan website on how to install the piggy-back and it was exactly the same as the c43/c450. I have recently replaced Dinan Piggy back for the BMS JB1 and their site didn't mention GLC43 either. They only listed the c400/c300 and c450. I followed the instructions that they had and it worked for the GLC43. The engine bay of the GLC43 SUV and GLC43 Coupe are exactly the same.