Vehicle price comparison
Mercedes C Class vs Audi Q7 Transmission Control Module prices
Saurabh Kumar
Co-Founder & CTO, Part Price Guide
Built the pricing pipeline that collects and normalizes used OEM part listings from salvage yards and online marketplaces across the US.
Ambika Sharma
Co-Founder & COO, Part Price Guide
12 years of project management and technical operations experience. Reviews price guides for sample size, fitment accuracy, and data freshness.
Price face-off
Median price comparison
Condition comparison
How does the price differ by part grade?
Market analysis
Why does the Audi Q7 transmission control module cost more?
A used Audi Q7 transmission control module carries a median asking price of $123, which is 19% higher than the Mercedes C Class at $100. Supply also plays a role: Mercedes C Class has 17,328 priced listings versus 2,780 for Audi Q7, and more listings generally mean more choices and more competitive pricing.
The Mercedes C Class average ($121) runs 21% above its median ($100), indicating a tail of high-priced listings — likely low-mileage or remanufactured units pulling the average up.
Our guide covers 11 model years for the Mercedes C Class (2015–2025) but only 9 for the Audi Q7 (2015–2025), so the Mercedes C Class data reflects a broader range of generations.
The Audi Q7 transmission control module is interchangeable across 21 model years versus just 17 for the Mercedes C Class — that wider compatibility window means more donor vehicles in salvage yards and tends to push prices lower.
Buyer's checklist
What to check before buying a used transmission control module
- Match OEM hardware and software part numbers exactly, as shift schedules and solenoid driving algorithms differ between gear ratios and engine sizes.
- Determine if the module is standalone, integrated into the PCM/ECM, or mounted internally on the transmission valve body (mechatronic unit).
- Check if the module requires VIN programming, clutch adaptation relearns, or flash updating before normal gear engagement will occur.
- Inspect connector pins for fluid wicking; leaky transmission harness seals can force transmission fluid up into the TCM connector plug pins.
Full price guide
Mercedes C Class Transmission Control Module
$18 – $595 · 17,328 listings
Full price guide
Audi Q7 Transmission Control Module
$22 – $700 · 2,780 listings
Common questions
Mercedes C Class vs Audi Q7 transmission control module FAQ
Is a used Mercedes C Class transmission control module cheaper than a Audi Q7?
Mercedes C Class has the lower median by $23 (19%). The Mercedes C Class transmission control module ranges from $18 to $595 across 17,328 listings, while the Audi Q7 ranges from $22 to $700 across 2,780 listings.
Can I use a Mercedes C Class transmission control module in a Audi Q7?
This comparison describes pricing, not interchangeability. Even when two parts share similar prices, they may require different engines, trims, electronics, or mounting points. Always match the seller's part number against your VIN before purchasing.
How many listings does this comparison cover?
This comparison draws from 17,328 priced Mercedes C Class listings and 2,780 priced Audi Q7 listings — 20,108 in total.
How does condition grade affect the price?
Part condition significantly impacts price. Grade A (Excellent): Mercedes C Class $106 vs Audi Q7 $130. Grade B (Good): Mercedes C Class $101 vs Audi Q7 $121. Grade C (Fair): Mercedes C Class $75 vs Audi Q7 $65. Grade A parts are in excellent condition, B is good, and C is fair — always confirm grading criteria with the seller.
Are there different trim variants to choose from?
Yes. The Mercedes C Class transmission control module has 2 trim variants and the Audi Q7 has 2. Variants differ by engine size, drivetrain, or part number — matching the right variant is critical for proper fitment.
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