The H&R 29772 is a full front and rear set of sport lowering springs for the W208 Mercedes-Benz CLK320 and CLK430 coupe built after July 1997. The manufacturer describes its coils as German-made and cut from 54SiCr6 spring steel, then shot peened for durability. They replace the factory coils and keep the original dampers in place, so you get a lower stance and a firmer, more connected feel without the cost of a full coilover conversion. Owners on user forums say the drop closes the wheel-arch gap and reduces body lean through corners. The spring rate is described inconsistently across sources, so confirm the design with the manufacturer before ordering. Searches for "W208 CLK430 sport springs," "CLK320 coupe lowering springs 29772," and "H&R sport springs W208 after 7/1/97" will bring up this exact application.
Fitment is the first thing to check. The part is listed for coupes built after 7/1/97 and excludes convertibles, so confirm your body style and build date before buying. Model-year ranges vary between listings, typically covering 1997 to 2002 or 1998 to 2002, so match the part to your VIN. Published drop figures also differ, with some sources citing roughly 1.4 inches at the front and 1.3 inches at the rear and others citing a larger average, so treat any single number as approximate. Stock ride height on these cars can also shift with options and factory pad thickness, which means the final stance depends partly on the rubber perch pads you run. Owners on user forums commonly keep the stock dampers, though some pair the springs with sport shocks for better control.
The fitment notes for this part exclude convertibles and list the CLK320 and CLK430 coupe only, so confirm your body style and build date before ordering.
Owners on user forums report that the factory rubber perch pads come in graded thicknesses, with each step roughly 5 mm, and that changing pads requires removing the springs first. Fitting thinner or thicker pads at each corner is the usual way to adjust front and rear height independently.
Owners on user forums frequently reuse the stock dampers, but some recommend sport shocks alongside the springs for better control and a more consistent ride after lowering.
This is a moderate-to-advanced DIY job. The rear is the easier end: owners on user forums note that you can drop the rear trailing arm on a jack by removing the bolt that attaches it to the body, so a rear spring compressor is not required. The front is the tougher job. Removing the upper spring plate ring typically requires a special tool, and an aftermarket spring compressor may not compress the factory spring enough to free that ring. Many owners on user forums take the front strut assemblies to a shop instead. Compressed coil springs are dangerous, so use proper compressors and support the car on stands. Plan to replace the pads at the same time if you want to fine-tune ride height.
