By blew I mean the car just stopped moving forward and just revs in any forward gear. It does engage in reverse.

This is a simple repair that many members have done.

Here is your diagnosis:

B2 Piston Failure
B2 Piston Failure - PeachParts Mercedes ShopForum

722.118 transmission B2 servo/piston *B2 Piston*
722.118 transmission B2 servo/piston - PeachParts Mercedes ShopForum

I Am Really Hurt Now *B2 Piston*
I Am Really Hurt Now - PeachParts Mercedes ShopForum

C220 won't go forward. HELP!!! *B2 Piston*
C220 won't go forward. HELP!!! - PeachParts Mercedes ShopForum

B2 Piston W124
B2 Piston W124 - PeachParts Mercedes ShopForum

My Superior Shift Kit thread (W124 300DT)
My Superior Shift Kit thread (W124 300DT) - PeachParts Mercedes ShopForum

Slow leak around B2 Piston--change piston?
Slow leak around B2 Piston--change piston?





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__________________
ASE Master Mechanic
https://whunter.carrd.co/

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
2003 Volvo V70

https://www.boldegoist.com/

Have your mechanic contact me directly.

All of the issues sound simple.

.

__________________
ASE Master Mechanic
https://whunter.carrd.co/

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
2003 Volvo V70

https://www.boldegoist.com/