Yes, a bad brake lamp switch can cause that issue.
That would NOT leave a code in the traction OR engine systems.

ANY problem with the potientiometer or throttle actuator SHOULD leave a code in the engine system computer. ie: P0 120 or P0 500...good luck

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
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