Doubt if the pump is the problem! NEVER replaced on in 30 years!

Bet the problem is $$$$$$$$ ! Rear leveling shocks & air cells (accumulators) are $$$. Cheaper to convert to regular suspension. IF the car is too low in the rear simply get rear springs from a regular sedan or coupe that weren't designed for leveling systems!

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MERCEDES Benz Master Guild Technician (6 TIMES)
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190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
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