Date registered: Jan 2005
Vehicle: 1991 300E
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RE: 380 SL noise
I have a 1991 300E, also hum/whine depending on speed, but particularly high pitch when coasting on the highway. Step on the gas and the hum is mostly gone.
I thought it may be the rear differential, since the triangular yellow warning light turns on during cornering?
Anyway, the audience here says it is the fuel pump.
The car also smells like gas when I stop it.
What do you expect should a replacement cost?