Mercedes-Benz CLK wheel bolt & nut sizes
The Mercedes-Benz CLK (1996–2009) uses M12x1.5 wheel fixings with a R12 radius seat and a 17mm hex. It has 5 per wheel, so a full set is 20. Check the table below for the exact fixing for your year and wheel type.
Last updated 2 October 2026
Thread
M12x1.5
Seat
R12 radius
Hex size
17mm hex
Strength
Class 10.9
Sizes by year and wheel type
| Image | Model code | Wheel type | Thread | Length | Seat | Hex size | Finish | Strength |
|---|---|---|---|---|---|---|---|---|
| 1996–2003 5 per wheel | ||||||||
| 208 | Steel Wheels | M12x1.5 | 21mm | R12 radius | 17mm hex | Zinc | Class 10.9 |
| 208 | Alloy Wheels | M12x1.5 | 40mm | R12 radius | 17mm hex | Zinc | Class 10.9 | |
| 2003–2009 5 per wheel | ||||||||
|
| 209 | Steel Wheels | M12x1.5 | 21mm | R12 radius | 17mm hex | Zinc | Class 10.9 |
| 209 | Alloy Wheels | M12x1.5 | 40mm | R12 radius | 17mm hex | Zinc | Class 10.9 | |
A dash in the length column means no length is listed for that fixing. Not sure which wheels you have? Steel wheels usually have a plastic trim cover over them.
Locking wheel keys for the Mercedes-Benz CLK
Lost or damaged your locking wheel key? Find a replacement for your Mercedes-Benz.
Common questions
What size are Mercedes-Benz CLK wheel bolts?
Mercedes-Benz CLK wheel fixings are M12x1.5 with a R12 radius seat and a 17mm hex.
Do steel and alloy wheels use the same bolts on a Mercedes-Benz CLK?
The thread, seat and hex size are the same.
How many wheel bolts does a Mercedes-Benz CLK need?
5 per wheel, so 20 for a full set of four wheels.