One of my friends has an E320 that needs the brakes serviced on it. The light has been on in the dash for some time now. I have heard that one cars equipped with the SBC (?) system lock the calipers down when the car is shut off for a safety feature. Is this a true statement, and how do you go about changing pads if they lock down every time the car is shut off.

Thanks in advance

Kurt Kiefer

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2003 Dodge Ram 2500 Cummins - Georend fully built trans, Banks Big Hoss Bundle, Smarty Tuner, 5" turbo back exhaust. 500 HP and 1100 ft/lbs to the ground.
1979 Mercedes-Benz 300CD - Lost to a four car pile up on 275, Thank You Michigan Drivers.
1986 Mercedes-Benz 300D - Sold, Euro non-turbo car.

The SAFEST way is by de-activating the system with a scanner! EXTREME caution if you don't have the correct equiptment!!

However if you disconnect the electrical connector from the hydraulic unit, remove the key & close the doors, & wait for 15-20 minutes, the system will go to sleep & you can do the pad/rotor service.

DO not open a bleeder!! do not try to bleed brakes!

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MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
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44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

OK just to verify.

Shut car off (leave key in)
Disconnect ECU
Remove Key
Shut doors.

Thanks for the quick response this is exactly the info i was looking for.

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2003 Dodge Ram 2500 Cummins - Georend fully built trans, Banks Big Hoss Bundle, Smarty Tuner, 5" turbo back exhaust. 500 HP and 1100 ft/lbs to the ground.
1979 Mercedes-Benz 300CD - Lost to a four car pile up on 275, Thank You Michigan Drivers.
1986 Mercedes-Benz 300D - Sold, Euro non-turbo car.

Bump?

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2003 Dodge Ram 2500 Cummins - Georend fully built trans, Banks Big Hoss Bundle, Smarty Tuner, 5" turbo back exhaust. 500 HP and 1100 ft/lbs to the ground.
1979 Mercedes-Benz 300CD - Lost to a four car pile up on 275, Thank You Michigan Drivers.
1986 Mercedes-Benz 300D - Sold, Euro non-turbo car.

None of that is accurate.

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Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles