2012 w204 rear brake caliper bolts

[pcthrillrider]

i brought a crows foot spanner for the bolts which i thought were 17mm but it does not fit too small,anyone know what size they are?

 

[grober]

REAR WHEEL BRAKE MERCEDES C-KLASSE [Car] [CHASSIS] (EUROPA)
if you mean caliper carrier to hub bolts makes em M12x1.5[ slightly finer thread] x35 which would require a 19mm spanner
ISO metric screw thread - Wikipedia

 

[pcthrillrider]

REAR WHEEL BRAKE MERCEDES C-KLASSE [Car] [CHASSIS] (EUROPA)
if you mean caliper carrier to hub bolts makes em M12x1.5[ slightly finer thread] x35 which would require a 19mm spanner
ISO metric screw thread - Wikipedia

thx but it's a 18mm head