BenzUnited Parts
Custom M112 3.2L V6 ECU Tune for Mercedes CLK320, E320, C320, SLK320
Custom M112 3.2L V6 ECU Tune for Mercedes CLK320, E320, C320, SLK320
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A custom Stage 1 ECU calibration for the M112 3.2L naturally aspirated V6 — optimized throttle mapping, torque delivery, ignition timing and fueling, developed for your car rather than pulled off a shelf.
What the Tune Alone Delivers
+15 HP and +10 lb-ft on an otherwise stock car
Premium fuel. No hardware changes. This is an honest number for a naturally aspirated engine — and it is the starting point, not the ceiling.
- Sharper throttle response with no lag
- Stronger mid-range torque for confident acceleration
- Smoother power delivery and refined drivability
- Factory safety systems fully retained
- Includes OBD cable and support
Driving a C32 AMG, SLK32 AMG, or Crossfire SRT-6? Those cars use the supercharged M112K Kompressor engine, which takes a different calibration entirely. Go to the M112K tune instead →
Where the Rest of the Power Is
A naturally aspirated engine has no boost to raise. The calibration can only optimize the air the engine is already moving — which is why the honest tune-only figure is +15 HP, not the inflated numbers you'll see elsewhere for this platform.
The real gains come from letting it breathe. Add K&N high-flow filters, a high-flow X-Pipe, and shorty headers, then recalibrate around all three, and the full configuration is worth +30 HP and +25 lb-ft — double the tune alone. All three are available as options above, and all three retain your factory catalytic converters.
| Configuration | Gain |
|---|---|
| Stage 1 tune only | +15 HP / +10 lb-ft |
| Tune + K&N filters + X-Pipe + shorty headers | +30 HP / +25 lb-ft |
Partial combinations land between the two. Tell us what you're running and we'll calibrate to it.
Exact Compatibility
This calibration is for the naturally aspirated M112 3.2L V6 only.
| Model | Years | Engine |
|---|---|---|
| CLK320 | 1998–2005 | M112 3.2L V6 (naturally aspirated) |
| E320 | 1998–2005 | M112 3.2L V6 (naturally aspirated) |
| C320 | 2000–2005 | M112 3.2L V6 (naturally aspirated) |
| SLK320 | 2000–2003 | M112 3.2L V6 (naturally aspirated) |
| Chrysler Crossfire (non-SRT) | 2004–2008 | M112 3.2L V6 (naturally aspirated) |
Not sure which engine you have? Send us your VIN and we'll confirm before you order.
Frequently Asked Questions
How much power will I actually gain?
+15 HP and +10 lb-ft from the tune alone on a stock car running premium fuel. Add the K&N filters, X-Pipe and shorty headers and the full configuration is worth +30 HP and +25 lb-ft. This is a naturally aspirated engine — there's no boost to turn up, so the hardware is where the second half of the power comes from.
Should I buy the bolt-ons now or later?
Either works, but tell us up front if you're planning to add them. We'd rather write one file around the finished setup than tune the car twice.
Is this tune safe for my engine?
Yes. We keep all factory safety systems active and tune conservatively for long-term reliability.
Will this work on my C32 AMG or SLK32 AMG?
No. Those run the supercharged M112K Kompressor engine and need a different file. Use our M112K tune instead. The same applies to the Chrysler Crossfire SRT-6.
How long does the process take?
Typically 2–4 business days after we receive your stock ECU file.
Will it pass emissions / smog?
The tune, K&N filters, X-pipe, and shorty headers all retain your factory catalytic converters. Emissions requirements vary by state — check your local rules if you're unsure.
