The H&R 29749-1 is a progressive-rate sport spring set for the W202 C-Class sedan, covering the C220 and the C230 (including the supercharged C230 Kompressor). The set includes four springs, front and rear, made from 54SiCr6 spring steel at H&R's ISO 9001 plant in Germany, shot-peened and powder coated for corrosion resistance. Compared with worn or soft original springs, it lowers the body roll and reduces the fender-well gap, while the progressive rate keeps everyday ride comfort intact. It is a better choice than a generic lowering spring if you want a German-built, tuned-rate part that is designed for street and occasional spirited driving.
Fitment is the key buying question. This kit is specified for W202 cars built after June 1, 1996, so check your build date before ordering. Factory rubber shim perches (8 to 23 mm) sit atop the springs and affect final ride height, and cars with factory sport suspensions will drop less. Owners searching for a 1996-2000 C230 Kompressor lowering spring or a W202 sport spring upgrade should also plan for alignment after installation. Shock compatibility is debated on user forums, so review your damper setup before you buy.
The manufacturer's product designation specifies vehicles built after June 1, 1996. Confirm your build date before ordering, since earlier cars are not covered by this part number.
Opinions vary. Owners on user forums are split: some kept their factory dampers, while others replaced them with sport dampers, and a few reported the car feeling too low on the original shocks. Confirm damper compatibility with the manufacturer before installation.
Owners on user forums report success with a standard spring compressor, but they also warn that a proper compressor and a ball joint separating tool reduce the risk of damage during removal and installation.
This is an intermediate-to-advanced job that requires a lift or jack stands, a sturdy floor jack, and a spring compressor rated for the job. Owners on user forums describe supporting the lower control arm, removing the shock, the upper control arm, and the tie rod end, then hanging the brake caliper out of the way before the spring is released. Watch for the factory shim perches, because their thickness determines the final ride height. Plan on a four-wheel alignment after installation, and consider replacing worn suspension bushings and ball joints while the assembly is apart.
