SL/R231: sl400 tuning options in 2026?
Thread Starter
Junior Member
Joined: Dec 2025
Posts: 19
Likes: 4
2011 R350, 2025 GLA, 2018 SL450
sl400 tuning options in 2026?
looking at picking up an sl400/sl450 in the near future when a descent one comes up in my area and looking for tuning options in the US.
all I'm seeing is a racechip piggyback on vividracing.
are there any other options available?
all I'm seeing is a racechip piggyback on vividracing.
are there any other options available?
Thread Starter
Junior Member
Joined: Dec 2025
Posts: 19
Likes: 4
2011 R350, 2025 GLA, 2018 SL450
At $2500 Renntech is way overcharging for a 10+ year old tune, this isn't a new platform.
honestly If I'm going to be spending more than $500 for a tune I want to work with a tuner to make an E50 tune. I have an ethanol sensor I can plumb and wire in and the gas station down the street sells E15 and E85 that is 15% and 85% year round so 50/50 splash mix yeilds E50. was splash mixing for years on my '19mx5 rf (rip)
are there any mercedes remote tuners in the states worth while that can be trusted with doing a ethanol tune?
is OeTuning worth while?
I will reach out to vivid and weistech
honestly If I'm going to be spending more than $500 for a tune I want to work with a tuner to make an E50 tune. I have an ethanol sensor I can plumb and wire in and the gas station down the street sells E15 and E85 that is 15% and 85% year round so 50/50 splash mix yeilds E50. was splash mixing for years on my '19mx5 rf (rip)
are there any mercedes remote tuners in the states worth while that can be trusted with doing a ethanol tune?
is OeTuning worth while?
I will reach out to vivid and weistech
Last edited by weeblebiker; Apr 23, 2026 at 10:11 PM.
