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Editorials on the economy, technology, and lifestyle by Dr Jiulin Teng
Cover for post Understanding the Mercedes 722.3 / 722.4 / W4A Automatic Transmission (4G-Tronic)
30 Aug 2026
Understanding the Mercedes 722.3 / 722.4 / W4A Automatic Transmission (4G-Tronic)
Mercedes 722.3 is a hydraulically-controlled 4-speed automatic transmission. Today, let us check out not only how its gear train works but also how its hydraulic control functions.
Cover for post Understanding the Mercedes 722.6 5G-Tronic Automatic Transmission (NAG1)
27 Aug 2026
Understanding the Mercedes 722.6 5G-Tronic Automatic Transmission (NAG1)
The 722.6 5G-Tronic was arguably the most commercially successful automatic transmission ever produced by Mercedes. Today, let us see how its gear train works and analyze its design.
Cover for post Interpreting Transmission Adaptation Values
18 Aug 2026
Interpreting Transmission Adaptation Values
Transmission adaptation, usually in terms of fill time and pressure, can let us know the condition of an automatic transmission. This article discusses how to interpret the values.
Cover for post Dissembling Mercedes 722.9 7G-Tronic Transmission
22 Jul 2026
Dissembling Mercedes 722.9 7G-Tronic Transmission
Recently, I dissembled the 7G-Tronic transmission that I had replaced in my 2005 S500 last year. The failure point was the TCC. In this article, let us confirm the severity of the damage and check out how the 722.9 transmission works.
Cover for post V16 Mid-Engine Wedge Supercar, Type 6 (MCC 19)
10 Mar 2026
V16 Mid-Engine Wedge Supercar, Type 6 (MCC 19)
Today, let us go over the design of our flagship mid-engine wedge sports car powered by the 6L 45-deg naturally-aspirated V16 engine that I presented previously. Its codename is Type 6.
Cover for post Intake, Exhaust, and Emissions of the 6L 45° V16 Engine—MCC 18
05 Mar 2026
Intake, Exhaust, and Emissions of the 6L 45° V16 Engine—MCC 18
Today, let us round out the design of our PG601 45° V16 engine with top-end elements, accessories, and emission control. I believe that in the next decade, we will see more V16 engines, some achingly similar to PG601.
Cover for post The 6L 45° V16 Engine Short Block—MCC 17
03 Mar 2026
The 6L 45° V16 Engine Short Block—MCC 17
Today, let us delve into the short block of the 6L 45-degree V16 engine that I introduced previously and go over the reasoning behind its design choices, particularly with the philosophy of PG601 in mind.
Cover for post Designing a 6.0L 45° V16 Engine—MCC 16
26 Feb 2026
Designing a 6.0L 45° V16 Engine—MCC 16
I present a 6.0L naturally-aspirated V16 engine intended for flagship vehicles. It prioritizes character, drivability, and reliability rather than peak power.
Cover for post Extendable MP-FUV: Type 4 Is the Coolest Family EV
20 Feb 2026
Extendable MP-FUV: Type 4 Is the Coolest Family EV
Today, I am presenting Type 4, the world’s first extendable MP-FUV. It has 7 unique features, which I will touch on one by one.
Cover for post Compact Speedster: Type 2 with 11k-RPM V12 and Manual Transmission—Mcc 14
15 Feb 2026
Compact Speedster: Type 2 with 11k-RPM V12 and Manual Transmission—Mcc 14
Type 2 carries over the drivetrain of the Type 1 and making the chassis lighter and more focused is the more fruitful direction in the body style of a compact speedster.
Cover for post City Rally Hot Hatch: Type 3 with Turbo V4, e-Manual, and Double Wishbones—Mcc 13
12 Feb 2026
City Rally Hot Hatch: Type 3 with Turbo V4, e-Manual, and Double Wishbones—Mcc 13
Today, let us examine a front-mid engine, front-wheel drive compact hot hatch with double wishbone front and rear suspensions. It may be one of the most characterful and most enjoyable cars ever envisioned.
Cover for post V4 Hot-V e-Turbo 2.0L Engine for Cars—Mcc 12
08 Feb 2026
V4 Hot-V e-Turbo 2.0L Engine for Cars—Mcc 12
Today, I am introducing a unique 2.0L hot-V electric-turbo 90-degree V4 with motivations and specifications.