Assign standard size piston to cylinder bore - AR03.10-P-7021-02BV

Check values for cylinder bore

Number	Designation			Engines 112.910/911	Engines 112.913/920/921/922/ 923/940/941/942/943/ 944/945/949 113.940/941/942/943/ 945
BE01.40-P-1001-01F	Cylinder dia.	Standard Marking X	mm	83.200...83.215	89.900...89.915
		Auxiliary stage Marking ⓧ	mm	83.250...83.265	89.950 to 83.265
		Repair size	mm	83.450 to 83.465	90.150...90.165

Check values for cylinder bore

Number	Designation			Engines 113.960/961/ 962/963/964/ 965/967/968/ 971/980/981/ 982/984/987/ 988/989/990/ 991/992/993/ 995
BE01.40-P-1001-01F	Cylinder dia.	Standard Marking X	mm	97.000 to 97.015
		Auxiliary stage Marking ⓧ	mm	97.050 to 97.065
		Repair size	mm	97.250 to 97.265

Check values for pistons

Number	Designation			Engines 112.910/911	Engines 112.920/921/940 /941/942/943/944/945, 113.940/941/942/944	Engines 113.960/ 961/962961/ 962/ 963/ 964/965965/ 967/ 967/ 968/971980/ 981/ 980/ 981/982984/ 990/ 984
BE03.10-P-1001-02D	Piston diameter	Standard Marking X	mm	83.175 to 83.195	89.872 to 89.902	96.972 to 97.000
		Auxiliary stage marking ⓧ	mm	83.225 to 83.245	89.872 to 89.902	97.022 to 97.050
		Repair size	mm	83.425 to 83.445	90.122 to 90.152	97.222 to 97.250
BE03.10-P-1002-02D	Piston clearance	Standard Marking X	mm	≤ 0.040	≤ 0.043	≤ 0.043
		Auxiliary stage Marking ⓧ	mm	≤ 0.040	≤ 0.043	≤ 0.043
		Repair size	mm	≤ 0.040	≤ 0.043	≤ 0.043

Check values for pistons

Number	Designation			Engines 112.960/960/961 961 AMG	Engines 113.987/988/ 989/990/991/ 992/993/995
BE03.10-P-1001-02D	Piston diameter	Standard Marking X	mm	89.875 to 89.895	96.975 to 96.995
		Auxiliary stage Marking ⓧ	mm	89.925 to 89.945	97.025 to 97.045
		Repair size	mm	90.125...90.145	97.225...97.245
BE03.10-P-1002-02D	Piston clearance	Standard Marking X	mm	≤ 0.04	0.005...0.040
		Auxiliary stage Marking ⓧ	mm	≤ 0.04	0.005...0.040
		Repair size	mm	≤ 0.04	0.005...0.040

The pistons marked with an "x" must only be installed in the cylinder bores likewise marked with "x".

The piston diameter on engines 112. 113 is stated in two tolerances. The two tolerances of the piston diameters are distinguished one from the other by the letters "x" and ⓧ.
The marking is located on the top of the piston crown.

Shown on engine 112

Fig 1: Identifying Piston Diameter On Engines
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
The cylinder bore diameter on engines 112, 113 is stated in two tolerances. The two tolerances of the cylinder bore diameters are distinguished one from the other by the letters "x" and ⓧ.
The marking is located at the bottom right on the crankcase at the mount for the engine support.

Shown on engine 112

Fig 2: Identifying Markings Of Two Tolerances Of The Cylinder Bore Diameters
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.