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1) Has any of you owned a Smart 451 ED new from the dealer?
I find it hard to believe that people heard that noise while test driving a new car at the dealership. I can imagine the conversation, "Wow, driving an electric vehicle is so quiet BRRRRRRRRRRRRRRRRRR...".
2) If you did, do you remember hearing that "brake booster pump" noise?
I'm reading the service manual and came across page 63:
Note
The number of operating hours of the vacuum pump must be determined using DAS at the following intervals:
• Up to 4 years/125,000 km: every 2 years
• After 4 years/125,000 km: annually
The brake booster vacuum pump must be replaced after 1200 operating hours. If replacement is required, this is indicated by the drivetrain control unit.
Is that why we're getting the noise as "normal" on all our used Smart 451 EDs?
3) Because after 1200 hours of operating it needs to be replaced or it makes this noise and eventually fails/malfunctions?
I find it hard to believe that people heard that noise while test driving a new car at the dealership. I can imagine the conversation, "Wow, driving an electric vehicle is so quiet BRRRRRRRRRRRRRRRRRR...".
2) If you did, do you remember hearing that "brake booster pump" noise?
I'm reading the service manual and came across page 63:
Note
The number of operating hours of the vacuum pump must be determined using DAS at the following intervals:
• Up to 4 years/125,000 km: every 2 years
• After 4 years/125,000 km: annually
The brake booster vacuum pump must be replaced after 1200 operating hours. If replacement is required, this is indicated by the drivetrain control unit.
Is that why we're getting the noise as "normal" on all our used Smart 451 EDs?
3) Because after 1200 hours of operating it needs to be replaced or it makes this noise and eventually fails/malfunctions?